The following are known CodeBreaker Codes for All-Star Baseball 2003 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
  9C34F770 E956
  2D9A3D74 F2BA
  DF0C5F74 E0B9
• Home Team Scores 0
  D731A4AF EE83
• Home Team Scores 50
  952DB667 9F67
• Home Team Scores 100
  931D019A B6AB
• Home Team Scores 150
  71A11641 4347
• Home Team Scores 200
  6F90E1BC 6A99
• Home Team Starts With Score 5
  D673ACBE EE8A
  D2730C8B E482
• Home Team Starts With Score 10
  D673ACBE EE8A
  CD20E427 EFD1
• Home Team Starts With Score 20
  D673ACBE EE8A
  D33116CB C607
• Home Team Starts With Score 50
  D673ACBE EE8A
  952DB667 9F67
• Away Team Scores 0
  D673ACAF EE82
• Away Team Scores 50
  946FBE67 9F66
• Away Team Scores 100
  925F099A B6AA
• Away Team Scores 150
  70E31E41 4346
• Away Team Scores 200
  6ED2E9BC 6A98
• Away Team Starts With Score 5
  D673ACBE EE8A
  D331048B E483
• Away Team Starts With Score 10
  D673ACBE EE8A
  CC62EC27 EFD0
• Away Team Starts With Score 20
  D673ACBE EE8A
  D2731ECB C606
• Away Team Starts With Score 50
  D673ACBE EE8A
  946FBE67 9F66
• Start On 2nd Inning
  DA726C9A E698
  DA726C8B E490
• Start On 3rd Inning
  DA726C9A E698
  D9206403 E7D1
• Start On 4th Inning
  DA726C9A E698
  D8626C03 E5D0
• Start On 5th Inning
  DA726C9A E698
  DF30C4AF EE91
• Start On 6th Inning
  DA726C9A E698
  DE72CCAF EC90
• Start On 7th Inning
  DA726C9A E698
  DD20C427 EFD1
• Start On 8th Inning
  DA726C9A E698
  DC62CC27 EDD0
• Start On 9th Inning
  DA726C9A E698
  C331248B E683

Both Team Codes

• Infinite Outs
  910D37D2 D7EF
• 1 Out And You Are Out
  904F3FC3 D7E6
  931D375A D6AF
• 2 Outs And You Are Out
  904F3FC3 D7E6
  904F3FD2 D5EE
• Infinite Strikes
  B8487DD0 F2B9
• 1 Strike And You Are Out
  98447FC3 D695
  BA587D58 F3F9
• 2 Strikes And You Are Out
  98447FC3 D695
  B90A75D0 F0B8
• Infinite Balls
  BA587DD8 F3F9
• 1 Ball And You Walk
  9A547FCB D7D5
  B90A7550 F0B8
• 2 Balls And You Walk
  9A547FCB D7D5
  B8487D50 F2B9
• 3 Balls And You Walk
  9A547FCB D7D5
  BB1A75D8 F1F8
• Always Full Count
  BA587D58 F3F9
  B90A7550 F0B8
• Always Full Count & 2 Outs
  931D375A D6AF
  BA587D58 F3F9
  B90A7550 F0B8

Home Team Only Codes

• Infinite Outs
  D8627ED2 C7DC
  910D37D2 D7EF
• Infinite Strikes
  D8627ED2 C7DC
  B8487DD0 F2B9
• Infinite Balls
  D8627ED2 C7DC
  BA587DD8 F3F9
• Always Full Count
  D8627ED2 C7DC
  BA587D58 F3F9
  D8627ED2 C7DC
  B90A7550 F0B8
• Always Full Count & 2 Outs
  D8627ED2 C7DC
  931D375A D6AF
  D8627ED2 C7DC
  BA587D58 F3F9
  D8627ED2 C7DC
  B90A7550 F0B8

Away Team Only Codes

• Infinite Outs
  D92076D2 C5DD
  910D37D2 D7EF
• Infinite Strikes
  D92076D2 C5DD
  B8487DD0 F2B9
• Infinite Balls
  D92076D2 C5DD
  BA587DD8 F3F9
• Always Full Count
  D92076D2 C5DD
  BA587D58 F3F9
  D92076D2 C5DD
  B90A7550 F0B8
• Always Full Count & 2 Outs
  D92076D2 C5DD
  931D375A D6AF
  D92076D2 C5DD
  BA587D58 F3F9
  D92076D2 C5DD
  B90A7550 F0B8