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.

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.

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.