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While standing on the Helicarrier, press Up(2), Down(2), Left, Right to get 5,000 extra upgrade points. Note: This code can only be enabled one time.

Successfully complete the indicated task to unlock the corresponding character:

Black Cat: Successfully complete Toyko level 1.
Blade: Successfully complete Transylvania level 2.
Doc Ock: Defeat him in Tokyo level 2.
Green goblin: Defeat him in Tokyo level 4.
Iron Fist: Successfully complete Tangaroa island Level 3.
Lizard: Successfully complete Cairo level 2.
New Goblin: Successfully complete the game.
Rhino: Defeat him in Tangaroa Island level 4.
Sandman: Defeat him in Cairo level 4.
Scorpion: Defeat him in Tangaroa island level 2.
Venom: Defeat him in Transylvania level 4.

Finish the game than finish tokyo area 1.

Play through Co-op mode.

Hold L + R and press Circle, Down, X, Right, Square, Up, Triangle, Left at the "Stage Completed" screen. The New Goblin will be available for purchase for 4,000 tokens. He has the same stats and specials as the Green Goblin, but does it with style.