The Space Cerberus (宇宙ケルベロス Uchuu Keruberosu) is a creature from the series Keroro Gunso. A Space Cerberus' liver is known to cure all diseases. The home planet of Space Cerberus is Planet Doinaka.
The Space Cerberus appears in episode 50, when Giroro has to fight it to get its liver as a cure for Natsumi's mysterious illness. It appears similar to Cerberus, but with dragon-like heads and metal armor, giving it a robot look. Little else is known about it but it moves very fast and is extremely dangerous.
- Cerberus (mythology) at Wikipedia