All Working Ultimate Spider-Man Cheats - DS

Play as Spider-Man in black costume in multi-player mode
Get a 100% game completion.

Play as Carnage in multi-player mode
Get an 80% game completion.

Defeating Electro
When you fight Electro, about half way through the game, hit him with your tendril. When he turns blue, use the stylus to throw blue mail boxes and the car. Note: The car will respawn if you destroy it. If he gains health, use the tendril when he is red to take out the street lights. Note: The lights will flicker a few after you hit it, but if it is not out he can use it to regain health.

Glitch: Stop Venom's death
Note: This only works if there is a ceiling above Venom. When playing as Venom, while he is dying (when he falls to his knees and flops over), drag the stylus from him to the ceiling. He will resurrect and you still be able to play, but with an empty life bar.