Super Monkey Ball Cheats - GBA

Master code
Press [Down]x2, [Up]x2, [Left], [Right], [Left], [Right], [B], [A] when "Press Start" appears at the title screen. All bonuses and practice levels will be unlocked.

Blocky graphics
Press [Left]x2, [Right]x2, [Down]x2, [A] when "Press Start" appears at the title screen. The game title will change to confirm correct code entry. The game's frame rate will improve, at the expense of graphics quality.

Nice try message
Press [Up]x2, [Down]x2, [Left], [Right], [Left], [Right], [B], [A] when "Press Start" appears at the title screen.

Super speed
Hold [Up] + [A] during game play in any level and you will go much faster.

Slower speed
Hold [B] to go slower in the main game.

Bonus levels
Successfully complete a level without using a continue to unlock three bonus levels for that difficulty setting. Note: The Master difficulty setting does not have any bonus levels.

Beginner level 2: Warp To level 5
Instead of going forwards towards the goal, turn around and go up the little point. Fall off and land on a platform beneath. There should be another goal there that warps you to level 5.

Monkey Bowling: Different monkey's face
Get 2,500 play points and unlock Monkey Bowling. Choose any character to play as except Meemee. Note: Gongon works best for this. At the bottom-left side of the screen, there will be a picture of your character's head. Roll a strike, and your character's head at the bottom of the screen will change from the character you are playing as to Meemee's head.

Monkey Fight: Super power-ups
You can combine the power ups to create combos:

Big Glove + Big Glove = Double Glove
Big Glove + Long = Big, Long Glove
Big Glove + Vortex = Big, Vortex Glove
Big Glove + Big Glove + Long = Super Big, Long Glove
Big Glove + Big Glove + Vortex = Super Big, Vortex Glove