Youkai Douchuki (TurboGrafx-16)

Youkai Douchuki
Developer: Namco Publisher: Namco Platform: TurboGrafx-16 Released in JP: February 5, 1988 This game has a hidden developer message. This game has hidden developer credits. This game has hidden development-related text. This game has a Data Crystal page

Oh dear, I do believe I have the vapors. This page contains content that is not safe for work or other locations with the potential for personal embarrassment. Such as: Pixelated nude woman.

To do: Developer Messages. more passwords were discovered

Youkai Douchuki is a platformer ported from the arcade.

Hidden Text

This message appears at the beginning of the ROM:

Copyright 1987  
NAMCO LTD.  All 
Rigths Reserved 
Programmed By...
Haruhisa.Udagawa
 &  Kumi.Hanaoka
1987 8/1 - 11/15

Similar messages appear in other Namco games for the TurboGrafx.

Hidden Graphics

During the part where the turtle takes our hero Tarosuke to the underwater Palace of the Dragon God, a racy scene plays depicting princess Otohime performing an obscured strip show.

Normally, this scene is completely dark except for the three moving spotlights. However, viewing the background layer in an emulator reveals the princess being completely naked in the last part of the sequence.

Password Screen

There's a way to view developer messages by first holding down I, II, and Select and then pressing Run at the title screen.

The following passwords trigger these messages:

Password	Message	Translation
PC-ENGINE
NAMCO		Play it in arcades, too!
NAMCOT		Do you listen to Namcot Intelligence Agency?
6502		We won't be outdone by the 6809.
6809
68000
756-2311		Hello, you've reached Namco.
YAMASHITA		I hate [kayōkyoku] music.
AKIRA		Eheh eheh.
KOMAI		Let's play some table tennis!
KAZUHIKO		En-chan, can you find this?
KAWADA		I put a lot of effort into making this song.
HAL		I also made Galaxian for the Famicom.
NAUSICAA		Laputa is in here, too. Please look for it.
LAPUTA		You really thought it was in here? You have too much free time.
MICHIYO		I can't beat stage 3!
MONITOR
YAGI		Hey, baby, let's go for a ride!
YUKIHIKO		Please give me a motorcycle at a reasonable price.
NAGAMATSU		I love Defender!
UDADAGAWA		I always start from stage 4.
818-6104		I can't answer the question about this program.
HENTAIOSUGI		I always start from stage 2.
なむこむな!756-2311		There won't be any creepy things.

There are two more passwords, KUMI.HANAOKA and HARUHISA.UDAGAWA that only serve to delete whatever message is displayed at the time.

(Source: GameFAQs (real_mukimuki), yamada_arthur)