Tony Hawk's Pro Skater 4 (GBA)

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

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.

Matrix modeSpend $40 at the skate shop.

Stud mode
Spend $240 at the skate shop.

Moon physics
Spend $40 at the skate shop.

Alternate outfit
Spend $40 at the skate shop.

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

Pro Skater animations
Win the Pro Objective for that skater.

Always special
Spend $240 at the skate shop.

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

Perfect manual 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.

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.

Perfect rail balance
Spend $240 at the skate shop.

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

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