Extra Teams
     At  the  Title screen, using the D-Pad, press Up, L, Up, L, Down,
L,  Down,  L,  Left,  R, Right, R, Left, R, Right, R, B, A, hold Z and
press Start.

Big Heads
     At  the  Title  screen, press C-Up, C-Up, C-Down, C-Down, C-Left,
C-Right, C-Left, C-Right, B, A, hold Z and press Start.