Marvelous: Mou Hitotsu no Takarajima

Marvelous: Mou Hitotsu no Takarajima
Also known as: Marvelous: Another Treasure Island Developer: Nintendo Publisher: Nintendo Platform: SNES Released in JP: October 26, 1996 This game has unused items.

Marvelous: Mou Hitotsu no Takarajima is an adventure RPG in which the player switches between three protagonists to explore a verdant island and unlock the secrets of Captain Maverick's hidden treasure.

A fan translation was released in 2016.

Unused Items

Alternate Cell Key

In Chapter 3, Max accidentally swallows a key. After retrieving the key with a magnet, the player acquires an item called "ロウヤのカギ" (Cell Key). However, the game also contains a seemingly-unused item known as "すっぱいロウヤのカギ" (Sour Cell Key). It may have been intended to open the jail cell that appears in Chapter 4. However, in the final game, the door to the cell can be shut by stepping on a switch.

The order in which the items are listed in the game data doesn't synchronize very well with the game's story, so it's not very useful when it comes to making inferences.

(Source: 詩衣雫月 (discovery), GlitterBerri (translation))

Alternate Tomato

There's also an alternate "トマト" (Tomato) item with a different graphic. In the final game, the Tomato is a healing item that can fall, float, and sprout, but it can't be picked up and put into the inventory for later use. This alternate tomato, however, can be accessed through the inventory and set to B. Using it appears to have no effect, however.

(Source: 詩衣雫月 (discovery), GlitterBerri (translation))