At any time during gameplay, use these codes to morph into a different character:

Divine: Up, Left, Y + X

Crusher: Down, Right, Y + X

Yoko: Up, Right, Y + X

Bruiser: Down, Left, Y + X

Tsunami: Left, Right, Y + X

Kronk: Left, Left, Y + X

Boomer: Right, Left, Y + X

Turbo: Right, Right, Y + X