The following are known Action Replay Codes for Shrek Smash n’ Crash Racing on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

Master Code – Must Be On
e983ed2f
1dff51d2
0d9791f4
3246bbf0

Low Lap Time
0d00d402
e683eaf1

Press AR Button: On Last Lap
3eb61a5b
d862782e
c94706e8
f5feb0a8

Always Have Ribbon
95aa8607
6a325f5d

Have Super Ribbon
5d8dc724
2d51824b

Always Have Slipper
4e6f8c26
a8a49d8a

Have Super Slipper
5362bc66
1caed5d3

Always Have Frog
370955a1
729d2e45

Have Super Frog
18926157
cfa6238d

Always Have Thumb
584eeacc
72415718

Have Super Thumb
a5e6a041
8b8dc6d9

Always Have Berry
01876f2d
5a085eb4

Have Super Berry
7cf08807
2ce19eb6

Always Have Shake
b527183e
8b518848

Have Super Shake
da9e098f
b14987a7