The following are known Code Breaker Codes for Tony Hawk’s Underground 2 on Nintendo Game Boy Advance (GBA).

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

• Master Code – Must Be On
  00008B52 000A
  1001536A 0007
• Max Stats
  4200EE04 000F
  00000008 0004
• Have All Skaters
  82008AEC FFFF
• Have All Arcade Levels
  42008132 FFFF
  0000004E 0002
• Have All Cheats
  8200812C FFFF
• Story Mode Stages Complete/Have All Free Style Levels
  420089E4 0100
  02020065 0002
• Have All Mini Games
  3200844C 000F
• Infinite Time (Tennis Shooter Mini Game)
  8201DB3C 0E43
• Infinite Ammo (Tennis Shooter Mini Game)
  3201DB6C 0063
• Infinite Time (Stylin Mini Game)
  820196C8 0E43
• Have 0 Misses (Taggin Mini Game)
  320152F0 0000