Stage Select#
On the title screen, hold C and do a full clockwise rotation of the D-Pad until a sound is heard. Start the game, and the stage select will appear before the character select.
Alternately, use Game Genie code REFT-A6YN (US/Europe) or REFT-A6VJ (Japan).
Staff Roll#
On the title screen, and with the C button held the entire time, perform these moves:
- Starting at Up, do a full clockwise rotation of the D-Pad (i.e., same as the Stage Select).
- Starting at Down, do a full counter-clockwise rotation of the D-Pad.
- When you reach Down from the previous step, do a full clockwise rotation of the D-Pad.
The credits sequence will instantly start if successful.
It seems the programmer was trying to imitate a dial combination lock when implementing this cheat sequence.
(Source: JLukas)