Fire Emblem: Three Houses

Fire Emblem: Three Houses
Also known as: Fire Emblem: Fuukasetsugetsu (JP) Developers: Intelligent Systems, Koei Tecmo Publisher: Nintendo Platform: Nintendo Switch Released internationally: July 26, 2019 This game has unused playable characters. This game has unused enemies. This game has unused graphics. This game has unused items. This game has unused abilities. This game has unused text. This game has regional differences. This game has revisional differences. This game has a prerelease article

This article is a work in progress. ...Well, all the articles here are, in a way. But this one moreso, and the article may contain incomplete information and editor's notes.

Fire Emblem: Three Houses is both the first Fire Emblem game in HD and the first on a console since Radiant Dawn. New features include a universal class tree, a central hub to explore, battalions (so it's not just your merry band of teenagers against the world on the battlefield), and multiple canon endings (sorry, Fates).

It also tells the story of the worst high school reunion in history.

To do: Document battalions outside of just text strings. Provide footage for all unused scenarios with scrapped dialogue and voices (if possible). Document support and script changes between the Japanese and International script. Document more of the unused event scripting.

Sub-Pages

Prerelease Info

Unused Quests "I have something to ask of you... No, not that."

Unused Dialogue Originally, there would have been even MORE betrayals...

Unused Items Don't need what you don't see, I guess...

Unused System Text "That might be un...impossible."

Unused Unit Data Alas, poor Soldier; we hardly knew ye.

Regional Differences Be motivated, Byleth!

Revisional Differences LOTS of updates.

Oddities Including miscellaneous unused content and actual in-game oddities.

Unused Difficulty Mode

To do: Provide more images from Infernal difficulty and specify what other differences it has.

Besides Maddening difficulty, which was finished and added to the game in version 1.0.2, there is an unused fourth difficulty setting called Infernal. Hacking the game to access said difficulty reveals most enemies feature absurdly sky-high levels to the point of most of them reaching their stat caps around the midgame. It is also fairly unbalanced and unfinished for the most part, with many chapters lacking the necessary script to set the ending flags.

(Source: Faerghast (video))

Unused and Unseen Characters

Playable Jeralt, Rhea and Sothis

Jeralt, Rhea and Sothis - who only appear in the game as NPCs - have a complete set of voice clips, growths and stat caps specifically for playable units, with the first two having a spell learnset, set skill levels/proficiencies and even some data - mostly voice clips - for Tea Party. In Rhea's case, her Tea Party data was finalized and the option to invite her was added with the Wave 4 DLC through a new Quest. Interestingly enough, Sothis's base HP value is briefly visible when using the Sothis Shield skill, as the HP value of the Sothis NPC that appears to cast the spell on Byleth.

Jeralt

Level	Class		Crest			Skill Proficiencies
1	Commoner		Major Crest of Seiros			Strength in Lance, Authority, Riding; Weakness in Flying
	HP	STR	MAG	DEX	SPD	LUCK	DEF	RES	CHA
Base Stats	29	8	4	6	4	5	6	5	6
Growths	50%	45%	20%	45%	40%	25%	35%	35%	35%
Max Stats	94	64	30	62	54	40	49	48	49

Skill	Base Level
Sword	C
Lance	B
Axe	E
Bow	E
Brawling	E
Reason	E
Faith	E
Authority	C
Heavy Armor	E
Riding	B
Flying	E

Spell	Required Skill Level
Heal	D Faith
Nosferatu	D+ Faith
Recover	C Faith

Rhea

Level	Class		Crest			Skill Proficiencies
1	Commoner		Major Crest of Seiros			Strength in Sword, Faith
	HP	STR	MAG	DEX	SPD	LUCK	DEF	RES	CHA
Base Stats	28	9	9	6	6	6	6	10	10
Growths	45%	35%	45%	40%	40%	40%	30%	40%	70%
Max Stats	86	52	65	56	56	56	43	60	97

Skill	Base Level
Sword	B
Lance	E
Axe	E
Bow	E
Brawling	E
Reason	B
Faith	B
Authority	C
Heavy Armor	E
Riding	E
Flying	E

Spell	Required Skill Level
Fire	E+ Reason
Bolganone	D Reason
Ragnarok	A Reason
Agnea's Arrow	A Reason
Heal	D Faith
Nosferatu	D+ Faith
Recover	C Faith

Sothis

Level	Class		Crest			Skill Proficiencies
1	Commoner		Major Crest of Flames			None
	HP	STR	MAG	DEX	SPD	LUCK	DEF	RES	CHA
Base Stats	26	6	12	6	6	8	6	10	10
Growths	35%	30%	65%	40%	40%	65%	30%	60%	70%
Max Stats	71	43	93	56	56	89	43	85	99

(Source: Fire Emblem Wiki, DeathChaos (video)

Unused Battle Clips

To do: Provide the missing JP lines/voice clips.

While some of Jeralt's and Rhea's battle clips can be heard in-game in their appearances as allied units, they do also have playable-unit-specific lines that go unused in the final game. Sothis's battle lines, on the other hand, all go completely unused, except for her normal battle grunts that can be heard when she casts Sothis Shield on Byleth.

Speaker	Condition	Dialogue (JP)	Audio (JP)	Dialogue (EN)	Audio (EN)
Jeralt	When selected (Above 50% HP)	(TBA)	(TBA)	What's the plan?
	When selected (Between 25% and 50% HP)	(TBA)	(TBA)	Don't leave me exposed!
	When selected (25% HP or below)	(TBA)	(TBA)	Can't die just yet.
	Activating a critical hit (Special)	(TBA)	(TBA)	I see your weakness!
		(TBA)	(TBA)	Make your peace!
		(TBA)	(TBA)	No escape!
		(TBA)	(TBA)	Let's finish this!
	Level up (2 or fewer stats gained)	くたびれちまってんなあ……		Damn it! Utter nonsense...
	Level up	俺もまだまだやれそうだな		Even I have room to grow.
		がはは、ちったあ見直したか？		Guess I'm not done yet.
		この年になっても強くなれるんだな		Even at my age...
	Max level reached	ここまで来ちまうと頭打ちだな		It seems I've grown all I can.
	Skill level increased	まだ工夫できそうだ		I can use this.
		面白くなってきたぜ		Interesting.
		この感触、悪くねえな		Not bad.
		よーし、こんなもんだろう		That's more like it.
	Casual Mode retreat	やっちまったぜ…… 俺も焼きが回ったか……？		Damn... Am I losing my edge?
	Classic Mode defeat	(TBA)	(TBA)	(N/A)
	Gambit Boost (Normal)	(TBA)	(TBA)	I'll help.
		(TBA)	(TBA)	Protect them.
		(TBA)	(TBA)	We'll back you up.
	Gambit Boost (Special)	(TBA)	(TBA)	Let me help.
		(TBA)	(TBA)	I've got your back.
		(TBA)	(TBA)	I'll lend a hand.
	Triangle Attack	(TBA)	(TBA)	Everyone, together!
		(TBA)	(TBA)	Move as one!
		(TBA)	(TBA)	Move out!
Rhea	When selected (Above 50% HP)	(TBA)	(TBA)	As you wish.
	When selected (Between 25% and 50% HP)	(TBA)	(TBA)	May the goddess protect me.
	When selected (25% HP or lower)	(TBA)	(TBA)	Sweet goddess...
	Level up (2 or fewer stats gained)	何も言うことはありません		Disappointing...
	Level up	また力を得ました		I have ascended.
		主の恩恵に感謝を		Thank you, sweet Goddess.
		私も強くあらねば		I must be strong... I must.
	Max level reached	すべての力が今、解き放たれました		My full power is realized.
	Skill level increased	理解が深まりました		I understand this better.
		身についてきたようです		It is part of me now.
		役立てられそうですね		This will help the greater good.
		これはもう十分でしょう		That should do.
	Classic Mode defeat	(TBA)	(TBA)	(N/A)
	Gambit Boost	(TBA)	(TBA)	Let us join you.
		(TBA)	(TBA)	We will lend a hand!
		(TBA)	(TBA)	Allow me to help.
	Triangle Attack	(TBA)	(TBA)	At once!
		(TBA)	(TBA)	Lend me your strength!
		(TBA)	(TBA)	Join me!
Sothis	When selected (Above 50% HP)	(TBA)	(TBA)	Leave all to me.
	When selected (Between 25% and 50% HP)	(TBA)	(TBA)	Not at my best...
	When selected (25% HP or below)	(TBA)	(TBA)	I am not well!
	Activating a critical hit	(TBA)	(TBA)	Prepare yourself!
		(TBA)	(TBA)	Revenge, it lives!
		(TBA)	(TBA)	Atone at once!
		(TBA)	(TBA)	I shall cut through!
	When performing a combat art/critical hit	(TBA)	(TBA)	(N/A)
	When performing an attack at 25% HP or below	(TBA)	(TBA)	(N/A)
	When performing a combat art/critical hit at 25% HP or below	(TBA)	(TBA)	(N/A)
	Taking Damage	(TBA)	(TBA)	(N/A)
	Damaged by a critical hit, gambit, or Casual Mode defeat	(TBA)	(TBA)	(N/A)
	Level up (2 or fewer stats gained)	ぬぬ、わしの威厳が……		How undignified...
	Level up	わしの力、こんなものではないわ		I can do more than this.
		む、力が湧いてくるのう		Hm. I feel more powerful.
		良きかな、良きかな！		Not bad, not bad!
	Max level reached	この身では、これが限界かのう		This body has its limits...
	Skill level increased	ほう、これは面白い		How interesting.
		もう少し学びが要るのう		I ought to learn some more.
		己が力としてやろう		I will make my mark.
		新しき技に出会えるとは感慨深い		Each skill is like a treasure.
	Casual Mode retreat	許さぬ……！ おぬし……いつか痛い目を見るぞ……！		You shall not be forgiven!
	Classic Mode defeat	(TBA)	(TBA)	(N/A)
	Dodges an enemy attack or enemy deals 0 damage	(TBA)	(TBA)	(N/A)
		(TBA)	(TBA)	Too slow!
	Using a Gambit	(TBA)	(TBA)	They shall know fear!
		(TBA)	(TBA)	Don't try your luck!
		(TBA)	(TBA)	We must outwit them all!
	Gambit Boost	(TBA)	(TBA)	I'll lend my strength!
		(TBA)	(TBA)	I shall go too!
		(TBA)	(TBA)	Need some help?
	Triangle Attack	(TBA)	(TBA)	Now prove yourself!
		(TBA)	(TBA)	Go! Now!
		(TBA)	(TBA)	As one!
	Healed by ally	(TBA)	(TBA)	Well done!
		(TBA)	(TBA)	You've earned some praise!
		(TBA)	(TBA)	Oh! How nice!
	Defeated enemy	(TBA)	(TBA)	I am the Beginning!
		(TBA)	(TBA)	I'm guided by time's flow.
		(TBA)	(TBA)	I'm more experienced than you.
		(TBA)	(TBA)	Return to ash!
		(TBA)	(TBA)	You were no match for me!
		(TBA)	(TBA)	Oh! Did I catch you off guard?
	Praising an ally	(TBA)	(TBA)	Great work!
		(TBA)	(TBA)	Impressive!
		(TBA)	(TBA)	On to the next!

(Source: Fire Emblem Wiki [1], [2], [3], fedatamine [4], [5], [6])

Cleobulus

Data for an unused member of "those who slither in the dark" called Cleobulus (Japanese: クレオブロス Cleobulus) can be found near minor Agarthan NPCs like Myson, Bias, Chilon and Pittacus. They're set to use the Warlock class and have Agarthan Technology as their personal ability like other members. As the latter characters are all fought in Chapter 20/21 of the Silver Snow/Verdant Wind routes, this suggests Cleobulus was likely meant to serve a similar purpose as well.

• 

  Cleobulus's portrait

(Source: DeathChaos (tweet), fedatamine [7])

Mystery DLC Girl

The Wave 3 DLC (version 1.1.0) added a new character which was never finalized. Checking the game's data reveals said character is a 17 year old girl with the Commoner class, her birthday is on January 1, her base stats and growths are exactly the same as Ferdinand's, and she's set to call out voice clips absent in the game. Curiously, some of her data changed during updates: in version 1.1.0, she was affiliated with the Adrestian Empire and had a Minor Crest of Cichol; in version 1.2.0, however, her affiliation changed to the Church of Seiros and her Crest changed into a Major Crest of Flames.

(Source: DeathChaos (tweet))

Stable Hand, Trader, and Certification Proctor

These unused NPCs would presumably have been interacted with in the monastery to use the scrapped horse raising and trading features and to take certification exams (as described in the cut quest Try Certification Exams), respectively. Their character IDs are found near those of the used NPCs who are similarly in charge of used monastery features, such as the Choir Coordinator and Tournament Organizer. Perhaps unsurprisingly, leftover unit data indicates that the Stable Hand would've been placed at the Stables, the Trader at the Marketplace, and the Certification Proctor outside of the Officers Academy classrooms.

• 

  Stable Hand's portrait

• 

  Trader's portrait

• 

  Certification Proctor's portrait

(Source: fedatamine [8], [9], [10])

Count Galatea

Ingrid's father, Count Galatea, has a character slot with no other data assigned to it besides the name. Technically, he isn't entirely unused, as during the scene in Byleth and Ingrid's B support where they read a letter from him, the event script that handles showing the letter's contents calls his character ID with one of its parameters, but as this parameter has no visible effect in gameplay, his nametag is never seen by the player.

(Source: fedatamine [11], [12], original TCRF research)

Unused Playable Character Data for Cindered Shadows

Despite featuring a limited playable roster of 11 units, the Cindered Shadows DLC sidestory actually contains unit data for all 40 playable characters featured in all routes that goes unseen without hacking:

Character	Default Class	Certified Classes	Inventory	Skill Levels	HP	Str	Mag	Dex	Spd	Lck	Def	Res	Cha	Notes
Hubert	Dark Bishop	Noble, Mage, Dark Bishop	Steel Bow, Iron Bow, Mini Bow, Vulnerary	D Bow, B Reason, D Authority	34	12	28	17	16	13	12	21	13	Has Dark Bishop certified despite not qualifying to take its exam (he'd have only a 27% chance of passing, under the required minimum chance of 30%, and is also missing the required Dark Mage certification).
Ferdinand	Paladin	Noble, Cavalier, Paladin	Steel Lance, Iron Lance, Javelin, Vulnerary	D Sword, B Lance, D+ Axe, C Authority, B Riding	47	21	9	17	17	15	19	10	16	--
Caspar	Warrior	Noble, Brigand, Warrior	Steel Axe, Iron Axe, Hand Axe, Vulnerary	B Axe, D Brawl, E+ Authority	49	26	8	14	16	17	17	18	10	Has Warrior certified despite not qualifying to take its exam (he'd have only a 29% chance of passing, under the required minimum chance of 30%).
Bernadetta	Sniper	Noble, Archer, Sniper	Steel Bow, Iron Bow, Mini Bow, Vulnerary	D Lance, B Bow, E+ Authority	37	19	9	28	17	13	12	8	14	Has Sniper certified despite not qualifying to take its exam (she'd have only a 27% chance of passing, under the required minimum chance of 30%).
Dorothea	Warlock	Commoner, Mage, Warlock	Vulnerary	D+ Sword, B Reason, D Faith, D Authority	37	9	24	16	16	13	12	22	17	Has Warlock certified despite not qualifying to take its exam (she'd have only a 27% chance of passing, under the required minimum chance of 30%).
Petra	Assassin	Commoner, Thief, Assassin	Steel Sword, Iron Sword, Armorslayer, Vulnerary	B Sword, D Axe, C Bow, D Authority, D+ Flying	39	20	8	23	32	17	15	8	13	--
Dedue	Fortress Knight	Commoner, Armored Knight, Fortress Knight	Steel Lance, Iron Lance, Javelin, Vulnerary	D Lance, B Axe, D Brawl, D+ Authority, D+ Heavy Armor	56	25	8	12	2	10	29	7	11	Has Fortress Knight certified despite not qualifying to take its exam (he'd have only a 9% chance of passing, under the required minimum chance of 30%).
Felix	Swordmaster	Noble, Mercenary, Swordmaster	Steel Sword, Iron Sword, Armorslayer, Vulnerary	B Sword, D Bow, D Brawl, D Authority	43	26	11	17	29	13	16	8	12	Has Swordmaster certified despite not qualifying to take its exam (he'd have only a 27% chance of passing, under the required minimum chance of 30%).
Sylvain	Paladin	Noble, Cavalier, Paladin	Steel Lance, Iron Lance, Javelin, Vulnerary	C Lance, B Axe, D+ Authority, D Heavy Armor, C Riding	47	22	11	19	17	14	19	11	16	Has Paladin certified despite not qualifying to take its exam (he'd have a 0% chance of passing).
Mercedes	Bishop	Commoner, Priest, Bishop	Vulnerary	D Reason, B Faith, D+ Authority	37	11	23	16	16	13	12	25	18	Has Bishop certified despite not qualifying to take its exam (she'd have only a 27% chance of passing, under the required minimum chance of 30%).
Annette	Warlock	Noble, Mage, Warlock	Vulnerary	D Axe, B Reason, D Authority	33	12	25	18	15	13	12	19	14	Has Warlock certified despite not qualifying to take its exam (she'd have only a 27% chance of passing, under the required minimum chance of 30%).
Ingrid	Pegasus Knight	Noble, Cavalier, Pegasus Knight	Steel Lance, Iron Lance, Javelin, Vulnerary	D Sword, B Lance, D+ Authority, D+ Riding, D+ Flying	40	18	13	17	25	15	15	22	18	--
Lorenz	Paladin	Noble, Cavalier, Paladin	Steel Lance, Iron Lance, Javelin, Vulnerary	B Lance, D Reason, D+ Authority, D+ Riding	48	20	15	18	14	11	19	18	11	Has Paladin certified despite not qualifying to take its exam (he'd have only a 10% chance of passing, under the required minimum chance of 30%).
Raphael	Grappler	Commoner, Brawler, Grappler	Steel Gauntlets, Iron Axe, Iron Gauntlets, Vulnerary	D Axe, B Brawl, D+ Authority, D+ Heavy Armor	54	25	8	15	17	13	19	6	10	Has Grappler certified despite not qualifying to take its exam (he'd have only a 27% chance of passing, under the required minimum chance of 30%).
Ignatz	Sniper	Commoner, Thief, Sniper	Steel Bow, Iron Sword, Iron Bow, Vulnerary	D Sword, B Bow, C Authority	37	19	11	27	18	21	13	13	10	--
Lysithea	Warlock	Noble, Mage, Warlock	Vulnerary	B Reason, D+ Faith, C Authority	32	8	27	19	18	10	12	19	11	Has Warlock certified despite not qualifying to take its exam (she'd have only a 25% chance of passing, under the required minimum chance of 30%).
Marianne	Bishop	Noble, Priest, Bishop	Vulnerary	D Sword, C+ Faith, D+ Authority	36	9	24	15	15	15	12	24	17	Has Bishop certified despite not qualifying to take its exam (she'd have a 0% chance of passing).
Leonie	Paladin	Commoner, Cavalier, Paladin	Steel Lance, Iron Lance, Iron Bow, Vulnerary	C+ Lance, D Bow, D+ Authority, D Riding	43	21	9	21	19	15	20	10	16	Has Paladin certified despite not qualifying to take its exam (she'd have a 0% chance of passing).
Seteth	Wyvern Rider	Noble, Cavalier, Wyvern Rider	Steel Lance, Iron Lance, Iron Axe, Javelin	C Sword, B Lance, B Axe, C+ Authority, C+ Flying	45	25	14	19	18	11	19	8	19	--
Flayn	Bishop	Noble, Priest, Bishop	Vulnerary	D Lance, C+ Faith, D+ Authority, D+ Flying	35	11	23	16	14	10	12	26	19	Has Bishop certified despite not qualifying to take its exam (she'd have only a 9% chance of passing, under the required minimum chance of 30%).
Hanneman	Warlock	Noble, Mage, Warlock	Vulnerary	D+ Bow, B Reason, D+ Authority, D+ Riding	38	12	25	16	15	11	12	22	13	Has Warlock certified despite not qualifying to take its exam (he'd have only a 26% chance of passing, under the required minimum chance of 30%).
Manuela	Assassin	Commoner, Monk, Priest, Assassin, Bishop	Steel Sword, Iron Sword, Iron Bow, Vulnerary	D+ Sword, B Faith, D+ Authority, D+ Flying	41	20	15	20	30	14	15	9	17	The only unavailable character to be certified in more than one Advanced class. Has Assassin and Bishop certified despite not qualifying to take their exams (she'd have a 0% chance of passing for Assassin, and only a 27% chance of passing for Bishop, under the required minimum chance of 30%).
Gilbert	Fortress Knight	Noble, Fighter, Armored Knight, Fortress Knight	Steel Axe, Iron Axe, Hand Axe, Vulnerary	C Lance, C Axe, D+ Heavy Armor, C+ Riding	55	21	8	19	2	10	27	7	14	Has Fortress Knight certified despite not qualifying to take its exam (he'd have a 0% chance of passing).
Alois	Warrior	Noble, Fighter, Brigand, Warrior	Steel Axe, Iron Axe, Hand Axe, Vulnerary	B Axe, C Brawl, C+ Authority, C+ Heavy Armor	49	26	8	12	15	12	17	8	16	Has Warrior certified despite not qualifying to take its exam (he'd have only a 26% chance of passing, under the required minimum chance of 30%).
Catherine	Swordmaster	Noble, Myrmidon, Mercenary, Swordmaster	Thunderbrand, Iron Sword, Vulnerary	B+ Sword, C Brawl, D+ Authority	45	23	10	17	27	12	16	8	10	--
Shamir	Sniper	Commoner, Fighter, Archer, Sniper	Steel Bow, Iron Bow, Mini Bow, Vulnerary	C Lance, B+ Bow, D+ Authority	38	19	8	28	14	21	13	8	13
Cyril	Wyvern Rider	Commoner, Brigand, Wyvern Rider	Steel Axe, Iron Bow, Vulnerary	B Axe, D Bow, E+ Authority, D Riding, B Flying	43	22	10	18	20	16	18	8	12
Jeritza	Death Knight	Noble, Commoner, Cavalier	Iron Axe, Iron Bow, Vulnerary	B Sword, A Lance, D+ Brawl, D Authority, C Riding	48	25	17	14	22	12	20	18	8	Has both Noble and Commoner certified, which isn't normally possible, and doesn't have Death Knight certified despite it being his default class.
Anna	Trickster	Commoner	Iron Axe, Iron Bow, Vulnerary	D Sword, E+ Lance, E+ Axe, E+ Bow, E+ Riding	38	17	14	21	27	25	15	18	17	Doesn't have Trickster certified despite it being her default class (and is also missing the Thief certification that would normally be required for it).

Note that the base stats listed are those including the inherent stat boosts from the characters' default classes. Additionally, like the used characters, the unavailable characters are all at level 20, but unlike the used characters, they all have no battalion equipped and do not have any of their classes mastered.

(Source: DeathChaos (video))

Leftover Names

In the latter half of the unit name strings - after the character names, but before the generic occupation/class names for monastery NPCs and cutscene-exclusive characters - there is a sizable batch of completely unused names.

Name (JP)	Name (EN)	Notes
ヒョードル	Fedor	--
フェルド	Feld	--
リンクル	Linel	--
カッシュ	Kusch	--
ベルティア	Beltia	--
ドーラ	Dora	Fun fact: "Dora", spelt the same way, is also the Japanese name of the Miasma spell that appears in this game.
ペネット	Penette	--
グーグー	Dreeg	--
フェルヴァン	Felvan	--
アル	Al	This is the name of the protagonist of Fire Emblem: Hasha no Tsurugi, a spinoff manga that accompanied Fuuin no Tsurugi, though the odds of this entry having anything to do with him are slim to none.
シルエル	Silale	--
メリー	Mary	--
モリーネ	Maureen	--
グリンデル	Grindel	--
ロー	Loe	--
ウリエル	Uriel	--
シューマッハ	Schumacher	--
リッチェル	Richell	--
シュザンナ	Suzanna	--
ヘルダー	Helda	--
レイ	Ray	The Japanese spelling here is also the Japanese name of Raigh from Fuuin no Tsurugi, though again, there's very little chance of this being related to him.
セバスチャン	Sebastian	--
カーリー	Karly	--
ハンブルク	Hamburg	--
マシュー	Matthew	The seventh game also has a Matthew, though again, this is unlikely to have anything to do with him.
ギール	Gill	--
アルフレッド	Alfred	Alfred, spelled the same way in both English and Japanese, would go on to be used as the name of a playable character in Fire Emblem Engage.
カイア	Kaya	--
シャルル	Charles	--
ゲンリル	Genril	--

(Source: Original TCRF research)

Unused Crests

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Can the Crests of Chevalier and Flames activate on Staggering Blows as well (like how the Crest of Seiros can) when hacked onto a monster unit?

There are two unused crests with no assigned icons in the game's code.

Icon	Name (JP)	Name (EN)	Description text (JP)	Description text (EN)	Effect	Notes
(N/A)	アガルタの紋章	Agarthan Crest	アガルタの紋章。古の技術で作られた 武器に刻印されている。	The Crest of Agartha. This Crest is engraved into weapons created with ancient technology.	Unknown	The Scythe of Sariel, Athame, and Ridill are tagged to have compatibility with this Crest. Does not appear in-game even when hacked onto a unit.
(N/A)	錬成強化の紋章	Crest of the Forge	鍛冶屋の紋章。 錬成された武器につけられる。	A blacksmith's Crest. Can be attached to forged weapons.	Unknown	Every forged weapon in the game is tagged to have compatibility with this Crest. Does not appear in-game even when hacked onto a unit.

Additionally, all of the crests that only appear in their Major forms in the final game have fully-functional Minor versions leftover in the code as well.
(Note that because of how crest graphics are generated, these icons are not truly unique unused content, though the rest of the crests' data is.)

Icon	Name (JP)	Name (EN)	Description text (JP)	Description text (EN)	Effect
	エルネストの小紋章	Minor Crest of Ernest	長い歴史の中で失われた小紋章。 武器攻撃時、まれに相手は反撃不可。	A minor Crest long lost to history. Occasionally prevents enemy counterattacks when using a weapon.	10% chance of preventing enemy counterattacks when using a weapon.
	マクイルの小紋章	Minor Crest of Macuil	聖者マクイルが宿したとされる紋章 の小紋章。風を司る魔道の象徴。 魔法攻撃時、まれに威力が上昇。	They say Saint Macuil bore this minor Crest. A symbol of magic and mastery of the wind. Occasionally raises Mt during magic attacks.	10% chance of raising Might by 5 when attacking with magic.
	ノアの小紋章	Minor Crest of Noa	長い歴史の中で失われた小紋章。 魔法攻撃時、まれに回数消費なし。	A minor Crest long lost to history. Occasionally does not consume a use during magic attacks.	10% chance of not consuming a use when attacking with magic.
	オーバンの小紋章	Minor Crest of the Oban[sic]	長い歴史の中で失われた小紋章。 武器攻撃時、まれに相手は反撃不可。	A minor Crest long lost to history. Occasionally prevents enemy counterattacks when using a weapon.	10% chance of preventing enemy counterattacks when using a weapon.
	ティモテの小紋章	Minor Crest of Timotheos	長い歴史の中で失われた小紋章。 回復魔法使用時、 まれに回数消費なし。	A minor Crest long lost to history. Occasionally does not consume a use for recovery magic.	10% chance of not consuming a use when healing with magic.
	シュヴァリエの小紋章	Minor Crest of Chevalier	長い歴史の中で失われた小紋章。 戦技使用時、たまに与えたダメージ の３０％、自分を回復。	A minor Crest long lost to history. Sometimes restores HP equal to 30% of damage dealt when using Combat Arts.	30% chance of restoring HP equal to 30% of the damage dealt when using a Combat Art.
	炎の小紋章	Minor Crest of Flames	女神の象徴であり世界を司る小紋章。 まれに与えたダメージの３０％回復。 ごくまれに威力上昇・敵を反撃不可。	The minor Crest of the goddess. Occasionally restores HP equal to 30% of damage dealt. Rarely raises Mt and stops counterattacks.	10% chance of restoring HP equal to 30% of the damage dealt when using a weapon, Combat Art, or attack magic. When this effect activates, 25% chance of additionally raising Might by 5 and preventing enemy counterattacks.

(Source: Fire Emblem Wiki, fedatamine, SmoothAsFelt (testing), original TCRF research)

Unused Gambit

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Does the gambit retain any functionality?

There is only one Gambit which is never deployed for any kind of battalion, whether they're available for the player or are enemy-exclusive.

Icon	Name (JP)	Name (EN)	Might	Range	Uses	Area of Effect	Description text (JP)	Description text (EN)	Notes
	詭計百出	Bag of Tricks	--	100	1	?	範囲内の味方全ての計略カウントを０にする	Set Gambit Counter of all allies within range to 0.	Meant to reduce allies' gambit uses to 0. Currently unknown if it has any actual functionality.

Unused Terrain

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Do they retain any functionality?

Some of the terrain types listed in the strings went unused in the final game.

Name (JP)	Name (EN)	Description text (JP)	Description text (EN)
林	Woods	防御に適した地形 飛行は影響を受けない	Defensive terrain for all except fliers.
滝	Waterfall	進入不可 飛行は進入可能	Terrain that cannot be crossed, except by fliers.
高山	Peak	進入不可	Terrain that cannot be crossed.
飛行	Flier	進入不可 飛行は進入可能	Terrain that cannot be crossed, except by fliers.
積み石	Stones	進入不可 飛行は進入可能	Terrain that is navigable only by fliers.
欄干	Railing	進入不可 飛行は進入可能	Terrain that is navigable only by fliers.
篝火	Bonfire	進入不可 飛行は進入可能	Terrain that cannot be crossed, except by fliers.
炎の床	Flames	毎ターンＨＰにダメージ 飛行は影響を受けない	Causes damage with each turn. Has no effect on fliers.
空	Sky	進入不可 飛行は進入可能	Terrain that cannot be crossed, except by fliers.
雪原	Snowfield	地形効果なし	Terrain with no special effects.
回復床	Healstone	毎ターン戦力が回復	Restores Battalion Endurance with each turn.
回復床	Healstone	毎ターンＨＰが回復 守備・魔防が上昇する地形	Recover HP every turn. Raises Def and Res.
毒	Poison	毎ターンＨＰにダメージ 飛行は影響を受けない	Causes damage with each turn. Has no effect on fliers.
扉(修道院用)	Door	修道院の扉用の地形 いつでも進入可能	Door in the monastery. Terrain has no special effects.
段差床(修道院用)	Stair	修道院で隣のセルと段差がある床 いつでも進入可能	Floor with a difference in height with the neighboring cell in Monastery. Can pass anytime
生け垣(修道院用)	Hedge	修道院の生け垣用の地形 進入不可	Hedge in the monastery. Impassable terrain.
低い障害物(修道院用)	Low wall	修道院の低い障害物用の地形 進入不可	Terrain forming low obstacles in the monastery Impassable
屋内床(修道院用)	Floor	修道院で砂埃エフェクトを 出さない床に適用。	Applied to flooring in the monastery that doesn't kick up a cloud of dust.
修道院用木床 (Wooden Floor)	iron_untranslated	修道院で砂埃エフェクトを 出さない木の床に適用。 (Applied to wooden flooring in the monastery that doesn't kick up a cloud of dust.)	iron_untranslated
木床上の扉(修道院用) (Wooden Door (Monastery))	iron_untranslated	修道院で砂埃エフェクトを 出さない木の床(扉)に適用。 (Applied to wooden doors in the monastery that doesn't kick up a cloud of dust.)	iron_untranslated
屋内用階段(修道院用) (In-Door Stairs (Monastery))	iron_untranslated	修道院で砂埃エフェクトを 出さない屋内の階段に適用。 (Applied to in-door stairs in the monastery that doesn't kick up a cloud of dust.)	iron_untranslated
謎の扉	Odd Door	禍々しい気配を放っている 固く閉ざされている謎の扉	A mysterious door. It is tightly closed and emits an ominous aura.

(Source: Original TCRF research)

Unused Graphics

Unused Class Sprites

Several characters (Hubert, Ferdinand, Ashe, Raphael, Lysithea, Leonie, and Hanneman) have sets of personalized class sprites for their playable appearance in Part II with specific Master/Advanced classes. They're left unused in the finished game, as they use generic class bodies instead.

Jeralt has class sprites depicting him as a playable Commoner and Paladin despite only appearing as an NPC unit.

Used	Unused

Dimitri's Part II class sprites always depict him with an eyepatch, even in the Crimson Flower route where he retains both of his eyes for story-related reasons. In spite of this, there's an unused sprite meant for said route which displays him with both eyes that are stored on their own separate spritesheet.

Used	Unused

Likewise, Rhea has unique sprites for the Saint class she uses for Crimson Flower. In the final game, the sprites in question are loaded only for the Rhea used during CF's lategame story events (ID 58) rather than the one used for Chapter 17's story mission (ID 36), meaning the Archbishop class's sprite always ends up reused instead.

Class sprites for generic NPCs with the Dancer class can be found among the other sprites. Interestingly, only the female dancer happens to have portrait graphics to match within the game's files.

The Wave 4 DLC added sprites for generic NPCs using the Trickster, War Monk, War Cleric, Valkyrie, and Dark Flier classes. As only male Tricksters and Valkyries are used in-game (by purchasing the DLC Pass), the sprites meant for the female Trickster, War Monk, War Cleric, and Dark Flier NPCs ended up being left unused.

(Source: Original TCRF research)

Unused Icons

Multiple battalion icons are left unused in the finished game as no battalions ever use them.

Several icon variants for weapon and equipment exist in the game which are left unused in the game proper.

Gold, silver, and black icons for white, black, and dark magic spells exist in the game even though none of them are used.

Icons denoting monsters' weaknesses also exist for brawling, white magic, black magic, and dark magic spells despite none of them being used.

Three icons meant for unknown abilities can be found among other sprites.

Two icons meant for unused item type(s).

Some unused icons for item categories in the Inventory and Storehouse menus. The last set appears to be derived from the Dining Hall meal activity icon, so perhaps it was meant for the scrapped useable meal items?

These icons might've been meant for instruction modifiers (i.e., skill strengths/weaknesses, professor expertise, statue bonuses, etc.), given the style.

A camera icon is located among the sprites displayed during battle animations.

This icon is stored with, and formatted similarly to, attack labels such as "MISS" and "CRITICAL" displayed during battle animations. Perhaps it was meant to be used for hits that break a monster's barrier?

A 'Break' mechanic would later appear in the next game, Fire Emblem Engage, though it is unknown if they are related.

Amidst the icons used to display an unit's affiliation, the flag used by Miklan's Thieves seen in Chapter 5's map and ensuing cutscene is left unused.

Even though battalion endurance has a maximum level of 3 in the final game, sprites meant to denote a fourth and fifth level exist in the graphics files.

Icons for three of the scrapped Group Tasks can still be found among the game's files.

The labels for monastery activities include a few unused icons, including one likely meant for the scrapped horse raising activity.

Various icons of unknown purpose, found among files related to monastery UI elements. The text of the last one (好物) translates to "favorite food".

This bright red icon meant to be used when choosing the scrapped Infernal difficulty still lies with the rest of the title screen UI elements.

An unused option for the explore phase's main pause menu. The text (次週へ) reads "To Next Week", so this might've been for a quick way to skip ahead to later in the month, like the Skip option in free time-action selection.

Options for an unknown menu. Using the final game's text strings as a reference, these correspond to, in order, "Instruct" (個別指導), "Group Tasks" (グループ課題), "Recruitment" (スカウト), "Assignments" or "Mission Orders" (任務受注, the only one of these phrases that doesn't appear somewhere in the final game), "Gifts" (贈り物), "Talk" (会話する), and "Certification Exams" (資格試験).

Unused Portraits

A placeholder character portrait that, as with many previous Fire Emblem games, depicts a silhouetted figure. Interestingly, the small version is actually used in the game; if you move your cursor near an activated Viskam turret in Zoom View, it will have a portrait pop-up in the same style as regular units that uses this portrait.

All of the portrait sets for playable characters include a portrait with a blushing expression, but some of these are never used in-game.

Many of the named NPCs and enemies also have portraits for various expressions that go unused.

Similar to the class sprite situation, portraits meant for generic NPCs with the female Trickster, War Monk, and War Cleric Classes are left unused.

Unused S-Rank Support Images

Seteth	Flayn	Catherine	Cyril

At the end of the Crimson Flower route, Byleth loses their connection to Sothis, and their hair returns to their normal blue hue. This is reflected in the S-Rank support illustrations seen in the game's ending, which come in both blue-haired (for Crimson Flower) and green-haired (for the other three routes) variants as appropriate to the availability of each character in the appropriate routes. However, blue-haired variants exist for four characters who are unavailable in Crimson Flower: Seteth, Flayn, Catherine, and Cyril.

Unused Part II Murals

Horsebow Moon (Part II)	Wyvern Moon (Part II)	Red Wolf Moon (Part II)	Alternate Ethereal Moon (Part II)

Graphic files depicting the Horsebow, Wyvern, Red Wolf, and Ethereal Moon murals can be found in spite of the first three months never being visited in any route during Part II and the last using completely new graphics for its brief appearance in the second half of the game.

Placeholder Cutscene Images

This is a placeholder variant of the cutscene illustration depicting Zanado from Chapter 2. In the placeholder, Sothis is standing atop the building; in the final version, she is replaced with a nondescript white statue.

These images displaying Edelgard, Dimitri and Claude alongside their respective houses' flags are loaded for the story event "A Pair of Professors", but end up swapped with unique CGs built in-engine with the game's assets.

(Source: fedatamine [13])

This small placeholder image meant for displaying small objects/shots in cutscenes is repeated multiple times in the game's files.

Unused Chest Graphic

For whatever reason, this unassuming treasure chest is the only small-sized, non-placeholder CG that goes unused in the final game. What it might've been meant for is unknown.

(Source: Fire Emblem Wiki, fedatamine, original TCRF research)

Unused Voice Clips

Academy Phase Death Screams

Death screams for Byleth and every student during the Academy Phase exist in the game, but are left unused as the game is hardcoded so that none of those units can die during Part I. Interestingly, even though male Byleth's English VA, Chris Niosi, was replaced with Zach Aguilar in version 1.0.2, Byleth will still use the former's death scream should the game be hacked to restore this function.

To do: Provide the JP screams.

Speaker	Sound (EN)
Male Byleth (Chris Niosi)
Male Byleth (Zach Aguilar)
Female Byleth
Edelgard
Dimitri
Claude
Hubert
Ferdinand
Linhardt
Caspar
Bernadetta
Dorothea
Petra
Dedue
Felix
Ashe
Sylvain
Mercedes
Annette
Ingrid
Lorenz
Raphael
Ignatz
Lysithea
Marianne
Hilda
Leonie
Cyril

(Source: DeathChaos [14])

Ashen Wolves English Death Screams

Due to an oversight, and in spite of the characters having different death screams recorded for each dub, Yuri, Balthus, Constance, and Hapi will always use the Japanese death screams should they die during the War Phase, regardless of whether or not the game's dub is set to English.

Speaker	Sound (EN)
Yuri
Balthus
Constance (Indoors)
Constance (Sunlight)
Hapi

(Source: Original TCRF research)

Unused NPC Death Screams

All major NPCs have death screams, but due to plot reasons, a few of them have their screams unheard in the game without hacking.

To do: Provide the JP screams.

Speaker	Sound (EN)
Aelfric
Lord Arundel
Cornelia
Flame Emperor
Kronya
Miklan
Nemesis
Solon
Thales

(Source: Original TCRF research)

Unused Monastery Quest Clips

Monica, Fleche, Judith, Rodrigue, Ladislava, Sothis, and Tomas have unused voiced lines meant to be used when they offer a monastery quest.

To do: Provide the JP lines.

Speaker	Dialogue (EN)	Sound (EN)
Fleche	Excuse me, I have a request.
	Thank you very much!
Judith	Hey you! Would you do me a favor?
	That was great. You saved me!
Ladislava	I'm sorry to trouble you, but...
	I appreciate your cooperation!
Monica	Can you please do me a favor?
	Oh, thank you. You saved me!
Rodrigue	I have a favor to ask.
	I appreciate it.
Sothis	I've got a task for you.
	Well done!
Tomas	May I ask a favor of you?
	Thank you. You truly helped me out.

(Source: Original TCRF research)

Unused Maps

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: Are there more unused maps beyond these two?

War at Gronder & Taking Fort Merceus Variations

To do: Provide footage of the unused maps in question.

There exist unused variations for the story maps War at Gronder and Taking Fort Merceus, which were meant to serve as a Chapter 17 and 18 respectively according to remaining leftover text. Both maps also have the same beginning logs seen in their used variations, with the Fort Merceus map sharing its description with the Silver Snow and Verdant Wind variants of the mission.

The spawn data for the Gronder Field map is 118 and for its script is 119, while for Fort Merceus they're 120 and 121 respectively. Both maps have the same exact spawn data, which consists of a few generic NPCs in the Black Eagles route's version of the mission. Meanwhile, the data for the Blue Lions and Golden Deer paths is completely empty beyond the basic script used for loading up the map.

Interestingly, these are the only maps in which Female Byleth is specifically called by the Spawn Data; all other maps call Male Byleth by default, and the game's code accounts for the female option if it was chosen instead.

(Source: fedatamine [15], [16], DeathChaos)

Unused Classes

King of Beasts, King of Fangs and King of Wings

At the very end of the class list (save for DLC and placeholder slots), along with the various other monster classes, there are entries listed for three unused monster classes: King of Beasts (Japanese: 獣の王 King of Beasts), King of Fangs (Japanese: 牙の王 King of Fangs), and King of Wings (Japanese: 翼の王 King of Wings). Given that in auxiliary maps containing a red exclamation icon, it's possible to find a specific Wild Demonic Beast, Giant Wolf, or Giant Bird bearing these names respectively, it's possible these classes may have been planned to be used by said units instead.

Most of their assigned data is identical to that of the corresponding used monster classes, but unlike those classes, they don't have any innate abilities assigned. They also have unique name and description strings:

Name (JP)	Name (EN)	Description (JP)	Description (EN)
獣の王	King of Beasts	理性を失った野生の魔獣の中で 特に強い魔力を持つ魔獣の王。	King of demonic beasts. Among the feral beasts who have lost their reason, this one has particularly strong magic power.
牙の王	King of Fangs	魔力を取り込み巨大化した狼の中で 特に強い魔力を持った狼の王。	King of wolves. Among the wolves who have grown to unnatural size by absorbing magic, this one has particularly strong magic power.
翼の王	King of Wings	魔力を取り込み巨大化した鳥の中で 特に強い魔力を持った鳥の王。	King of birds. Among the birds who have grown to unnatural size by absorbing magic, this one has particularly strong magic power.

(Source: fedatamine, DeathChaos, original TCRF research)