The following are known CodeBreaker Codes for Super Monkey Ball Jr. on Nintendo Game Boy Advance (GBA).

The codes should work with the region specified but may work for other regions as well.

This game requires a CodeBreaker Version 1.1+.
• Enable Code (Must Be On)
  00005520 000A
  100385E0 0007
• Stop Timer
  33001A20 0005
• Infinite Lives
  32002ADC 0004
• Speed-up Fall Out Scene
  72002AE0 0058
  32002AE0 0000
• Speed-up Ready Scene
  72002AE0 0030
  32002AE0 0010
• Press Select To Skip Stage
  D0000020 0004
  33001C94 0001
• Max Play Points
  82002C4C E0FF
  82002C4E 05F5
• Infinite Continues
  32002C58 00FF
• Unlock Monkey Fight
  32002C51 0001
• Unlock Monkey Bowling
  32002C52 0001
• Unlock Monkey Golf
  32002C53 0001
• Unlock Golf Course B
  32002C55 0001
• Unlock Master Stages
  32002C56 0001
• Unlock Credits
  32002C57 0001

Monkey Fight Codes

• Have Really Big Glove
  73003FFC FF00
  3300405C 0002
• Have Long Reach
  73003FFC FF00
  33004064 0060
• Have Vortex
  73003FFC FF00
  3300406D 0001