Enter the following codes at the "Tonight's Game" screen right before the faceoff:

Big-Headed Players: Simultaneously press Up, Pass, and Turbo.

Baby Headed Players: Press Turbo, Turbo, Up, Shoot, Shoot, Up.

Big Headed Goalie: Press Pass, Pass, Turbo, Shoot, Pass.

Big Puck: Press Up, Up, Down, Down, Turbo.