Kao The Kangaroo

Go tothe map screen during gameplay, the enter the following
button combinations:

Bonus checkpoint: Hold L + R and press Up, Right, Down, Left, A.
Bonus glove: Hold L + R and press Down, Right, Left, Down, A.
Bonus life: Hold L + R and press Down, A, Up, Left, A.
Infinite checkpoints: Hold L + R and press Up, Right, Down, Right, Left, A.
Infinite gloves: Hold L + R and press Down, Right, Up, Right, Left, B.
Infinite health: Hold L + R and press Down, B, B, A, Up, Left, Right.
Infinite lives: Hold L + R and press Down, Left, B, Left, B, B.
Select stage: Hold L + R and press Up, Down, Right, Left, Up, X.
Skip stage: Hold L + R and press Up, Up, Left, Down, X.