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|Your name's Percival?|
The Cerebellians were brain-like creatures were a sapient species native to the rocky world of Cerebella. Because of their frail bodies, the beings were often seen using mechanical constructs to move about their environment. Oddly enough, they can speak vocally, which is surprising because they appear to not have a mouth.
- Ratchet & Clank: Going Commando (first appearance)
- Ratchet & Clank: Up Your Arsenal
- Ratchet & Clank: Into the Nexus (cut content)