Game and Watch Gallery Cheats - GameBoy

Reset memory
Press [Up]x2, [Down]x2, [Left]x2, [Right]x2 at the title screen. Note: This will delete all high scores and saved game files.

Quick save
Pause game play, then power off the Game Boy. Game play will resume at the point it was paused the next time the game is started.

Toggle music
Press [Select] at the mode selection screen. A musical note will be displayed when music is enabled.

Expert mode
Score 1000 points in a game in a modern mode game. Then press [Up] at the game and level selection screen to play a more difficult version of that that same game.

Unlocking the panels
Press [Left] or [Right] at the game selection screen to view the best scores for each game. Each star is equal to 200 points, with the top row displaying scores for modern mode and the bottom row displaying scores for classic mode. One "Gallery Corner" screen is unlocked for every 200 points of a game's high score. Thus, 800 points must be scored under the easy difficulty setting of each modern and classic game to unlock all sixteen panels. Note: Score 1000 points (five stars) in each game to unlock another bonus.

View credits
Earn 50 stars to view the credits. Earn 100 stars to have the credits available permanently.

Fire: Move quicker
To move from one end of the board to the other, instead of pressing the D-Pad twice, you can press the D-Pad once then [A] or [B] (depending on the direction). This not only makes them go faster, but it will save you from a lot of misses.

Octopus: Easy Points
When playing in Octopus, the easiest way to gain huge scores is to only grab about three pieces of treasure each time you go down. By doing this, you will have a lot of speed to dodge the tentacles, instead of having a full sack of treasure and being very slow.

Oil Panic (modern)
Bowser always faces the same direction as the very last oil drop that appeared.