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From TV Animation One Piece: Maboroshi no Grand Line Boukenhen!

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Title Screen

From TV Animation One Piece: Maboroshi no Grand Line Boukenhen!

Developer: Alpha Unit
Publisher: Banpresto
Platforms: Game Boy, Super Game Boy, Game Boy Color
Released in JP: June 28, 2002


GraphicsIcon.png This game has unused graphics.
DebugIcon.png This game has debugging material.
SoundtestIcon.png This game has a hidden sound test.
LevelSelectIcon.png This game has a hidden level select.


The One Piece series takes on an RPG adventure in the form of more obscure quizzes. Grand Line Dream Adventure Log is most notable for being the last official game to be compatible with the Game Boy, Super Game Boy, and Game Boy Color – all at a whopping 4MB!

Debug Menu

From TV Animation - One Piece - Maboroshi no Grand Line Boukenhen! GBC Debug.PNG

GameShark code 0108C3C6 or Game Genie code 089-7FC-E6E (using the Banpresto logo palette) will start the game in a debug menu. The menu includes a character viewer, cutscene viewer, sound test (music starts at 130), and the ability warp to any point in the game.

Unused Super Game Boy Palette

From TV Animation One Piece - Maboroshi no Grand Line Boukenki! J SGB Unused Palette.png

Appearing with the general border and INIT DATA_SND commands, there are two unused palette settings appearing slightly darker than the initial palette. It is unknown why they appear in the main listing instead of the separate palette listing.

Game Genie code ??8-47D-3BB (13, 23) will load either unused palettes. Both are located at 0x2813.