The following are known CodeBreaker Codes for E.T. The Extra-Terrestrial on Nintendo Game Boy Advance (GBA).

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

• Master Code – Must Be On
  9BDF2A00 61C5
  E4A01134 4108
  616F71C9 E655
• Infinite Health
  B1AFD96C E35C
• Infinite Continues
  70C571CC 4155
• Set Timer Back (Press Select)
  4B6870DC 18B7
  DAEFF6E8 E34A
  4B6870DC 18B7
  B599CF66 4B5C

Start on Level Codes

• Level 02
  F3FD9628 6B5C
  73749639 6A1D
• Level 03
  F3FD9628 6B5C
  E2ECB6B8 631C
• Level 04
  F3FD9628 6B5C
  6264B6B9 621D
• Level 05
  F3FD9628 6B5C
  F7F89630 6F08
• Level 06
  F3FD9628 6B5C
  77709631 6E09
• Level 07
  F3FD9628 6B5C
  E6E8B6B0 6708
• Level 08
  F3FD9628 6B5C
  6660B6B1 6609
• Level 09
  F3FD9628 6B5C
  9BFC9E38 691E
• Level 10
  F3FD9628 6B5C
  1B749E39 681F
• Credits
  F3FD9628 6B5C
  8AECBEB8 611E