:: video games cheat and cheat codes ::                                            

Playstation - Play Stadium 3 cheats

Unlock Sea stadium
After selected the "Homerun Race" mode, press Square, Triangle, 
Circle, X on controller-2 at the stadium selection screen.

Unlock Beach stadium
After selected the "Homerun Race" mode, press  X, Circle, Triangle, 
Square on controller-2 at the stadium selection screen.

Unlock Oldboys team
Choose the "Homerun Race" mode, then slecet the "Single Play" option. 
Go to the team selection screen and press X, Circle, Triangle, Square 
on controller-2.

Unlock Oldboys team in Team Edit mode
Press  X, Circle, Triangle, Square at the uniform selection screen 
on controller-2.