Enter any or all of these keypad sequences during gameplay using Player 1's controller:

Add Mana To Player 1:
Hold select and press Up, Down, Left, Right, Up, Down, Left, Right.

Add Mana To Player 2:
Hold Select and press Down, Down, Left, Left, Up, Up, Right, Right.

Player 1 Draw card:
Hold Select and press Down, Left, Down, Up, Up, Down, Down, Down.

Player 2 Draw card:
Hold select and press Left, Left, Left, Down, Up, Right, Up, Down.

Restore Life To Player 1:
Hold Select and press Triangle, Left, Right, Left, Right, Left, Left, Left.

Restore Life To Player 2:
Hold Select and press Square, Right, Left, Right, Left, Down, Up, Down.