Access Cheat Menu:
At the "Main Menu" press and hold C-Up + C-Down. You can now enter the codes below:

Hidden Teams:
At the cheat menu enter the following:
C-Up, C-Up, C-Down, C-Down, C-Up, C-Up, C-Down, C-Down

Small Players:
At the cheat menu enter the following:
C-Up, C-Right, C-Down

Big Head Mode:
At the cheat menu enter the following:
C-Up, C-Up, C-Down, C-Right, C-Down

Big Head Mode(home team):
At the cheat menu enter the following:
C-Up, C-Up, C-Down

Big Head Mode(away team):
At the cheat menu enter the following:
C-Up, C-Up, C-Down, C-Left, C-Right

Stretch Necks:
At the cheat menu enter the following:
C-Up, C-Up, C-Down, C-Up, C-Down

Small Players(home team):
At the cheat menu enter the following:
C-Up, C-Down

Small Players(away team):
At the cheat menu enter the following:
C-Up, C-Right