International Superstar Soccer 64

Nintendo 64

Six New Teams Cheat
At the title screen enter Up, L, Up, L, Down, L, Down, L, Left, R, Right, R, Left, R, Right, R, B, A, and then hold down Z and press Start. If you did it right the announcer will say What an incredible comeback.
Big Heads Cheat
At the title screen enter Top C, Top C, Bottom C, Bottom C, Left C, Right C, Left C, Right C, B, A, and then hold down Z and press Start. If you did it right the announcer will say Goal.