Unlock Everything
From the Title screen and press Select,UP,L2,R1,L1,R2.
submitted by jesse and Renz Villlaescusa (lilrv86@aol.com)
Bonus Characters
Each time you complete Arcade mode you unlock a different character:
Character
Complete Arcade Mode X number of times
Toad
1
Mystique
2
Sabretooth
3
Magneto
4
Bonus Pictures
Beat any of the following in the correct Mode with the corresponding amount of characters using the stated costume to unlock the corresponding pictures in Cerebro Mode.