Alive In Spikes Glitch
To stay alive in spikes, create a new skate park that has spikes in it. Then try the park and grind the edge of the spike hole. It doesn't matter what kind of grind it is. Then lean into the hole and you will fall into the spikes but get up and you can skate in the spikes. This cheat is great when playing tag in two player mode. (Just Don't Tell The Opponent The Cheat!!)
P.S.- May Not Work All The Time But Works About 90% Of The Time.
Perfect balance
Press Start during game play. Then, hold L and press C-Down, Right, Down, C-Left, C-Down, C-Up, C-Right, C-Left at the pause menu. The screen will shake to confirm correct code entry.
Flight mode
Press Start during game play. Then, hold L and press Right, Up, C-Down, C-Up, C-Down, C-Left(2), C-Right at the pause menu. The screen will shake to confirm correct code entry.
10X points multiplier
Press Start during game play. Then, hold L and press C-Down(4), C-Left, C-Right, Right at the pause menu. The screen will shake to confirm correct code entry.
Thin skater
Press Start during game play. Then, hold L and press Left, C-Right, Right, Down, C-Down, Up(2) at the pause menu. The screen will shake to confirm correct code entry.
Skate faster
Press Start during game play. Then, hold L and press C-Left, C-Down, C-Up, Down, Up, Right at the pause menu. The screen will shake to confirm correct code entry.
Double moon physics
Press Start during game play. Then, hold L and press C-Down, C-Left, C-Right, C-Left, Up, C-Down, Down, Right, C-Down at the pause menu. The screen will shake to confirm correct code entry.
More speed
To get more speed, hold A or C-Down.
Marseilles: Endless grind
Begin game play in the Marseilles level with the "Perfect balance" code enabled. Jump onto the a circle in the front going slow and grind.
Unlock Slow-Nic Mode
Pause the game. Press and hold L, then press C-Up, Down, Left, C-Left, C-Down, C-Up, C-Right.
Skip to restart
Pause the game. Press and hold L, then press C-Left, C-Down, C-Right, Down, C-Up, C-Up.
Simulation mode
Pause the game. Press and hold L, then press Left, C-Right, Right, Down, C-Down, Up, Up.
Super turbo mode
Pause the game. Press and hold L, then press Down, Left, C-Up, C-Down, C-Left, Right, Up.