Robot Zombies were undead robots found on Catacrom Four, where they had been risen from the dead because DreadZone defiled their sacred burial ground by turning it into a battlecourse. Since they were undead, they could survive without their legs, body, heads. They also appeared in a challenge called Zombie Attack at DreadZone Station, in the Torval battlecourse, and in Ghost Station as Ghost Zombies.
- Some of the zombie robots resembled ninja bots from Ratchet & Clank: Up Your Arsenal.
- Ratchet: Deadlocked (first appearance)