Rayman

Ten continues:
Press Up, Down, Right, Left at the continue screen after there are less than three continues remaining.

Twenty lives:
Pause the game.
Press and release A.
Press and release Right + B.
Press and release Left/Down + R.
Press and release Y+C+Z.
Twenty lives will be available when the game is resumed.

Ninety-nine lives:
Pause the game.
Press and release Up.
Press and hold X + B + Z (in that order), then release them in the same order.
Press L(2).
Hold Up + Y (in that order), then release them in the same order.
Ninety-nine lives will be available when the game is resumed.

Energy recharge:
Pause the game.
Press R, Left, Up, Right.
Hold C + B (in that order), and release them in the same order.
Hold R + L (in that order), then release them in the same order.
Rayman's energy will return to full when game play is resumed.