Cheats for Final Fight 3 (SNES)
Press Select + Start at the Capcom screen before the logo disappears. Note: For the PAL version of the game, hold Select and power on the SNES. The debug mode screen will appear after the Capcom logo.
Finding hidden rooms:
A closed door could indicate a hidden room. Throw someone at the door to break it open. It could contain items or be a shortcut.