X-Men Mutant Academy 2
  
Playstation


  


Play as Psylocke: 


  Beat the game with Wolverine in arcade mode to unlock Psylocke.


  


  Play as Juggernaut: 


  Beat the game using all default characters and Psylocke in arcade mode to unlock 
  Juggernaut.


  


  Play as Professor Xavier: 


  Beat the game with Juggernaut. Then, highlight Magneto and hold L1 at the character 
  selection screen.


  


  Play as Spider-Man:


  Fight in arcade mode until you face Spider-Man. Defeat him and finish arcade 
  mode. Then, highlight Cyclops and hold L1 at the character selection screen. 

Alternate Costumes:


  Play through academy mode with any character to get that characters alternate 
  costume. When you choose your guy hold R1 and press square if they were in the 
  first game, If they weren't hold R1 and press X. 
Unlock Everything:


  At the title screen press select, down, R2, L1, R1, L2 This will unlock everything 
  for everyone.
Pool Party: 


  Put in the unlock everything cheat and then in 2 player you can go to the Pool 
  Party as your stage. Everyone is equiped with a funny costume.



  
Thanks to Revolution readers marc aguihon, jacob and Karl!