International SS Soccer 64 Cheats (Nintendo 64)

Big Head Mode 
At the title screen,
just enter this code: 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. 
The announcer will say
"Goal!" if you did it
right. Go ahead and play the game
-- you're in for a big surprise. 
Hidden Teams 
Just when
you though International
Superstar Soccer 64 couldn't get
any better a code comes along
that unlocks six hidden teams in
the game. Here's what you do to
get hold of these babies. Using
the control pad, input this code:

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. 
The
announcer will say: "What an
incredible comeback!" if you
did everything right. Just goto
the team selection screen and
you'll see a another group of
teams, the All Stars. Have fun.