Game and Watch Gallery 3
Reset saved game
At the main screen, press Up(2), Down(2), Left(2), Right(2).
Pause the game and power off the Game Boy. When the Game Boy is powered back on, the game will automatically resume at the last point played.
At the mode selection screen, press Select. A musical note will appear when music is enabled. Note: Music is only played in modern mode games.
Earn two stars to unlock the Music room. Note: 200 points equals one star.
Earn five stars to unlock the Museum.
Earn ten stars to unlock the Flagman mini-game.
Earn twenty stars to unlock the Judge mini-game.
Earn thirty stars to unlock the Lion mini-game.
Spitball Sparkey mini-game
Earn forty stars to unlock the Spitball Sparkey mini-game.
Donkey Kong 2 mini-game
Earn fifty stars to unlock the Donkey Kong 2 mini-game.
View ending credits
Earn fifty stars to view the ending credits.
Earn sixty stars to unlock the Fire mini-game in the Gallery.
Grand Theft Auto
The following trick will advance the game to the next episode of the current level. Die or get arrested until you have no lives remaining. When the screen displaying your stats appears, press A to restart and use the same character. The next episode in the level will be unlocked. Repeat this procedure to unlock all the levels. Note: Once you start the next episode you must pause the game and press B button to quit in order for the level to be stored in memory.
Rename any character to "LEVELS" to unlock all cities. Alternately, rename any character to "WENDY".
Rename any character to "FULL".
Rename the character "KELLY" to "SUMNER" to unlock the game's developers.