50 Balls
     Pause gameplay, then hold L and press Up, X, B, Y, Left, Left.

All Characters
     Pause gameplay, then hold L and press X, B, Left, Y, Right, Right.

Flying Abilities for Any Character
     Pause gameplay, then hold L and press X, Y, A, Left, Left, Right,
Right.

Have Fruits During Entire Race
     Pause gameplay, then hold R and press B, X, Left, Left, Y.

Never Get Hit by Items
     Pause gameplay, then hold L and press X, B, B, Left, Left, Y, B.

Unlock Gex
     Successfully  complete the game with all three default characters
in  time  challenge,  stunt  challenge,  an  cash trial modes with all
medals.

Unlock Hex
     Successfully  complete  the  game  with Chops, Sid, and Zero-G to
unlock Hex as a selectable character.

Unlock Snyder
     Get the time challenge goal for every level to unlock Synder.

Unlock Tek-9 Glider
     Successfully  complete  the game with any character to unlock the
Tek-9 glider.