Super Monkey Ball cheats and cheat codes for Gamecube

Skip credits
When the first words appear on credits screen, hold L + R trigger and 
repeatedly hit the A buttons on your controller to skip credits.

Unlock 3 EX levels
Play in beginner mode and finish it, without losing any lives.

Unlock Master Mode
Finish the game once in expert mode withouth using a single continues.

Play on bonus level
Finish all normal stages on any difficulty level. When the credits begin, you 
can access to the bonus stage.

Unlimited continues
There are total three of mini-games. Purchase all of them, for every 2,500 play 
points you get, to get an extra continue. Reach 9 continues, and you will get 
unlimited continues.

Finish the Monkey Race instantly:
Push L + R + A + X + Y buttons while palying any Monkey Race on any setting.

Expert Level - Jump from Level 3 to Level 5
While playing on Stage 3 on the expert level, enter the GOAL 
when it rotates to the color green. 

Play with any mini-games with only 2,500 points:
If you reach 2,500 points in the game, save your progress to a memory card. 
Enter to the mini-games section and remove your memory card from the slot 
which contain your saved game file. Choose any mini-game to play.
You will have remain all of the points, beacuse the 2500 points 
will not be deducted.