| Unlockable | How to unlock
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|---|
| Kevin 1 | Level 1-3: Achieve a combo of 2 (solo or co-op)
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| Kevin 2 | Level 2-2: Achieve a combo of 3 (solo) or 5 (co-op)
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| Kevin 3 | Level 2-4: Achieve a score of 600 (solo) or 1,000 (co-op)
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| Kevin 4 | Level 3-1: Achieve a score of 450 (solo) or 1,100 (co-op)
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| Kevin 5 | Level 4-3: Achieve a combo of 4 (solo) or 5 (co-op)
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| Kevin 6 | Level 4-5: Achieve a score of 400 (solo) or 500 (co-op)
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| Kevin 7 | Level 5-5: Achieve a combo of 5 (solo) or 8 (co-op)
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| Kevin 8 | Level 6-4: Achieve a combo of 5 (solo) or 7 (co-op)
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