Here are some cheats and tips for the game Jikkyou Powerful Pro Baseball 6.
View all player statistics:
Press C-Up(2), C-Down(2), C-Left, C-Right, C-Left, C-Right, Start at the
status screen.
Bonus stadiums:
Press C-Up, C-Left, C-Right, C-Up, C-Right(2), Z, C-Left, C-Right, C-Left,
C-Right, Start at the stadium selection screen.