Need for Speed (Unlimited Turbo)
At the main menu, press Down, Down, Down, L, R, Z.

Bouncy, Bouncy (Bouncy Bike)
At the main menu, press Up, Up, Y, Y, X, X.

Your Head Expands (Big Head Mode)
At the main menu, press B, X, R, L, Right.

Drink Me (Tiny Mode)
At the main menu, press L, Z, Left, Right, B, B.

Tag You're It (Tag Mode)
At the main menu, press Z, X, Z, X.

Feel Lighter (Moon Gravity)
At the main menu, press Left, Right, Up, Down, B, B, B.

Unlock All Bikes
Complete the hardcore part of career mode to unlock all bikes.

Go to: Jeremy McGrath Supercross World Info Page | nGaming Home Page.