Here are some cheats and tips for the game Pit Fighter.
Mercy mini-game:
Press A at the title screen and enter the options screen.
Select practice mode and your characters. Position each fighter
to stand face to face in the arena. Push A + B on
both controllers. The fighters will hold hands and try to push
each other down. Rapidly tap A, B, and C
to push the other player.
Hidden options:
Press A + B + C at the title screen.