The following costumes and characters are unlocked by completing worlds in single player.
| Unlockable | How to Unlock |
|---|---|
| A. Baby (Agent outfit) | Finish World 5 |
| Baby Robo (character) | Finish World 10 |
| C. AiAi (Captain outfit) | Finish World 3 |
| F. GonGon (Frankenstein outfit) | Finish World 6 |
| P. YanYan (Princess outfit) | Finish World 7 |
| R. Doctor (Robot outfit) | Finish World 9 |
| Sonic The Hedgehog (character) | Finish World 8 |
| W. MeeMee (Witch outfit) | Finish World 4 |
