Defeat Magneto
To easily defeat Magneto, use Wolverine. Stand in the corner until Magneto starts to bring up the debris. Walk over to him and use the jumping upper-cut move. This will knock off the debris and hit Magneto. Repeat this until he's defeated.

Defeat Omega Red
When choosing an X-men to fight Omega Red choose Beast. When the level starts position your character under the first platform. When Omega Red lands near you press up punch or over over punch, this will knock Omega Red down. Jump on top of the platform until he goes back up then repeat the process.

Extra Life With Psylocke on First Level
When the first door opens and a guy comes quickly press Forward, Forward, Y. Then when he gets up make sure he does NOT move from that spot! While he is still in the spot hold down and then Jump and press the Y button{while still holding down (If you did it right you will get a plate that has a X on it.) You will have to get three of these to get a extra life}To get the second one walk towards the little cliff just before the second door. When you get to the cliff just before you walk off jump then press the Y button. To get the last one you will have to beat the robot boss and when the ground shakes and falls there will be these things you'll have to jump over on the last one the X-plate will be right by it.When you get these all you'll hear a funky sound.

Level Password
Hivebrood's Deserted Camp Xavier, Magneto, Gambit, Cyclops, Apocalypse, Gambit, Magneto, Magneto
Genoshan Prison Gambit, Beast, Magneto, Cyclops, Cyclops, Gambit, Magneto, Apocalypse
Apocalypse's Base Beast, Gambit, Beast, Wolverine, Magneto, Beast, Cyclops, Wolverine
Danger Room (Omega Red) Psylocke, Wolverine, Wolverine, Gambit, Wolverine, Beast, Psylocke, Cyclops
Danger Room (Juggernaut) Gambit, Beast, Cyclops, Cyclops, Wolverine, Cyclops, Psylocke, Beast
Avalon Beast, Gambit, Gambit, Wolverine, Magneto, Magneto, Xavier, Gambit
Mission 11 Beast, Psylock, Cyclops, Cyclops, Magneto, Cyclops, Wolverine