Jikkyou Powerful Pro Baseball 6 cheats and cheat codes for Nintendo 64

Bonus stadiums
Go to the stadium selection screen and press the following button combination:
C-Up, C-Left, C-Right, C-Up, C-Right(2 times), Z, C-Left, C-Right,
C-Left, C-Right, Start.

View all player statistics
Go to the status screen and press the following button combination:
C-Up(2 times), C-Down(2 times), C-Left, C-Right, C-Left,
C-Right, Start.