Spider-Man

Go to the options menu, enter the level selection and choose Spidey. Hold: Start on 2P and Hold: A+B+C on 1P then press (the diagonal button on the D-pad) up-right. Pause during the game and press A for Web refill, B for Full life, & C for Invincibility (this only lasts temporarily)

Go to the options screen and put spidey by the level option. Hold START on CONTROLLER 2 and hold A+B+C on CONTROLLER 1. While holding those buttons, press UP on CONTROLLER 1 then UP/RIGHT on CONTROLLER 1. You should see 3 exclamation marks next to the level now. Finish selecting your options and start the game

Now to access the cheat, pause the game and:

1) press A to max your web
2) press B to max your health
3) press C to get 5 seconds of invincibility
4) press A+B+C to go the next level!

When the game starts, go to options, change the difficulty to easy, change the controls to: A:Punch, B:Jump, C:Web
Now play the game; you should have unlimited web.