Super Robot Spirits cheats and cheat codes for Nintendo 64

Unlock all characters:
Just before the Banpresto logo disappears at the opening screen
enter the following button combinations:
L(9 times), R(7 times), Z, C-Down(10 times), C-Right(5 times)

Change victory stance:
Hold L or R when you see the "K.O." message at the end of the match. 

Unlock Judecca as playable character:
Play with the game at least 300 hour.

Unlock Devil Gundam as playable character:
Defeat story mode using all characters. After fight as 
Master Gundam in 64 mode and defeat Devil Gundam.

Unlock Master Gundam as playable character:
Defeat Master Gundam at least 3 times while playing in story mode.

Unlock Shining Gundam in all modes:
Play as Shining Gundam and win minimum 20 matches versus mode.
After go to the fighter selection screen highlight Shining Gundam 
and hit Start.

Change Walker Galliam and Dunbine costumes:
Play with the game at least 50 hour, then go to the fighter selection 
screen, highlight Walker Galliam or Dunbine and hit Start.