When you're low on health, there is one thing you can do. You can throw an enemy in a special way to steal some energy. ( R1 + O ). By pressing those buttons you're throwing the enemy but you're holding onto it longer and stealing energy. This has worked with Paragon and Spider-Man so far, so it should work with the rest of the characters.
Unlockable Card List
THEHAND ... Elektra swimsuit
REIKO ... Solara swimsuit
MONROE ... Storm swimsuit
SAVAGELAND ... Fantastic Four Comics
NZONE ... Tomorrow People comics
Brigade ... Beat him in Iron Man's third story stage.
Daredevil ... Beat him in Daredevil's third story stage.
Fault Zone ... Beat him in Storm's third story stage.
Hazmat ... Beat him in Magneto's third story stage.
Human Torch ... Beat him in Johnny Storms's third story stage.
Iron Man ... Beat Brigade in Iron Man's third story stage.
Magneto ... Beat Hazmat in Magneto's third story stage.
Niles Van Roekel ... Clear the Paragon fourth story stage.
Paragon ... Clear Paragon's third story stage.
Solara ... Beat her in Venom's third story stage.
Storm ... Beat Fault Zone in Storm's third story stage.
Venom ... Beat Solara in Venom's third story stage.
Unlockable Daily Bugle Arena (VS Mode)
After clearing story mode with Spiderman, create a versus mode fight between Spiderman and a CPU Venom on the New York City Bridge. Win the fight and the arena should be unlocked.
Submitted by meefas In Versus Mode, play as Fault Zone against a CPU Storm in the NYC streets. Win and you will unlock the Bugle as well.
Unlocking Stages And Characters (Loner's Version)
Create a Versus game and set the number of wins to one. After ten Versus matches, a new stage or character will be unlocked.