Cheat: Moon Gravity

Yes, we know the Spidey code is something else, but this is a better photo.

Pause the game, then hold L and press C-Down, C-Left, C-Right, C-Left, Up, C-Down, Down, Right, C-Down(2). If you entered the code correctly, the pause screen will shake and Moon gravity is yours.

If want Spiderman that bad though, hit pause, then hold down 7 on the number pad and press C, B, Right, V, B, Right, B, V, Right, C, Right, Up, Up, Left, Up and C. The screen should shake and boom, you've got Spidey and every other hidden character in the game. Otherwise, you'll have to create a custom skater and beat the game.