Tony Hawk's Pro Skater 4 [GBA]

Alternate outfit
Spend $40 at the skate shop.

Always special
Spend $240 at the skate shop.

Hidden skater
Complete the Pro Challenges to unlock Mindy, Frycook, Momo and Roger.

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.

Moon physics
Spend $40 at the skate shop.

Perfect manual balance
Spend $240 at the skate shop.

Perfect rail balance
Spend $240 at the skate shop.

Pro Challenge
Get all goals in a level. 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.

Skitchin'
To skitch a car, go behind a car and hold A + B.

Stud mode
Spend $240 at the skate shop.

The Zone level
Get all 90 packages to unlock The Zone.

Tony Hawk's Pro Skater 4 board
Go to the skate shop and select "Change Deck". The board under "Custom" is the Tony Hawk's Pro Skater 4 board for Neversoft skaters.

Turbo mode
Get all the gaps on each level except The Zone to unlock the Turbo option.

Walking
Hold Down until you stop moving. Then, hold A to pick up your board and start walking.