Successfully complete the game fifteen times to unlock the "Beast Mode" option.
Big kid mode
Successfully complete the game four times to unlock the "Big Kid Mode" option.
Break walls only in final round
Successfully complete the game eight times to unlock the "Break Walls" option.
Chaos Lab stage
Defeat Uranus in survival mode to unlock her Chaos Lab stage.
Com battle option
Successfully complete the game two times to unlock the "Com Battle" option.
Evil Laboratory stage
Successfully complete the game two times to unlock Cronos the Phoenix's Evil Laboratory stage.
Expert mode
Successfully complete the game twelve times to unlock the "Max Difficulty" option.
Fast, Easy, Simple Win
Play as Yugo the wolf and play with knockdown battle and no walls and at the beginning of the fight move the controlor stick towards your opponent and press X at the same time. Your opponent should fly out of the ring if you do this correctly.
Fight against Uranus
Successfully complete the game three times to unlock Uranus. She resembles some kind of Minotaur. Alternately, complete time attack mode in under 20 minutes. Next, choose versus mode, highlight the "Next Character" box press A multiple times then press B.
Fight as Cronos the Phoenix
Successfully complete the game two times to unlock Cronos the Phoenix.
Fight as Ganesha the Elephant
Successfully complete the game one time to unlock Ganesha the Elephant.
Fight as Kohryu
Play the game in arcade mode. Win four consecutive rounds. You will fight Kohryu in the next round. Defeat him, then complete arcade mode to unlock Kohryu the Iron Mole as a selectable character.
Fight as Uranus
Defeat Uranus in stage 16 of survival mode. To make this easier, play as Kohryu and enable the "Beast mode", "No walls", and "No blocking" cheats. When the "Ready?" message appears, push them to the corner of the stage and step back. When the "Fight!" message appears, do Kohryu's projectile move (Down, Down/Forward, Forward, Beast). They will fly off for a ring out. Note: This will also unlock her stage.
Hidden Rewards
Finish Arcade Mode enought times to unlock the following:
1: Ganesha the Hindu god of Wisdom and Movie Player
2: Cronos the Pheonix and the Com Battle
3: Kid Mode
4: Big Head mode
5: Big Arms Mode
6: No walls
7: Weak Walls
8: Walls breakable in Final Round
9: Slow Motion
10: Increased Speed
Human mode
Successfully complete the game fourteen times to unlock the "Human Mode" option.
Hyper mode
Successfully complete the game sixteen times to unlock the "Hyper Mode" option. Note: This also unlocks Kohryu the Iron Mole. Kohryu has no ending.
Indian Palace stage
Successfully complete the game one time to unlock Ganesha the Elephant's Indian Palace stage.
Kid mode
Successfully complete the game three times to unlock the "Kid Mode" option.
Knock down battle mode
Successfully complete the game thirteen times to unlock the "Knock Down Battle Mode" option.
Movie player option
Successfully complete the game one time to unlock the "Movie Player" option.
No blocking mode
Successfully complete the game eleven times to unlock the "No Blocking Mode" option.
No walls mode
Successfully complete the game six times to unlock the "Eliminate All Walls" option.
Secret Course
Play on the course Chinese Temple and use the "No walls" code. When you start the fight directly behind the players where the wall is gone there is a big platform. Knock your opponent onto the platform. Your player will automaticly jump onto the platform. For this to work your opponent can not fall off the platform or else the fight will be called a ring out.
Slow motion mode
Successfully complete the game nine times to unlock the "Low Speed" option.
Super buff (DK) mode
Successfully complete the game five times to unlock the "Super Buff" option.
Turbo mode
Successfully complete the game ten times to unlock the "High Speed" option.
Weak walls mode
Successfully complete the game seven times to unlock the "Weaken All Walls" option.