Jet pack mode: Spend $40 at the skate shop. Press B to fly up, A to move right, L to move left, and R to hover.
Matrix mode: Spend $40 at the skate shop.
Alternate outfit: Spend $40 at the skate shop.
Stud mode: Spend $240 at the skate shop.
Always special: Spend $240 at the skate shop.
Perfect rail balance: Spend $240 at the skate shop.
Perfect manual balance: Spend $240 at the skate shop.
Turbo mode: Get all the gaps on each level except The Zone to unlock the Turbo option.
Hidden skater: Complete the Pro Challenges to unlock Mindy, Frycook, Momo and Roger.
The Zone level: Get all 90 packages to unlock The Zone.
Pro Challenge: Get all goals in a level. Note: This must be done before any of the buyable cheats can be used for that skater.
Pro Skater animations: Win the Pro Objective for that skater.
Moon physics: Spend $40 at the skate shop.