|"Hehe, nice doggies."|
|— Box Ghost on Cerberus|
Cerberus is a giant three-headed dog who serves under Pandora. It is the pet of Pandora and a guard of her lair. It is a minor background character.
In "Phantom Planet" it is in the large mob of ghosts that surround Danny in the Ghost Zone after the net containing ghosts is torn open.
Cerberus is a giant, menacing three-headed dog with green fur, red eyes, and tail. It has large fangs and claws.
Cerberus is very aggressive, as seen when it attacks the Box Ghost.
- Cerberus is the original Hellhound, a canine creature with three heads that, according to Greek mythology, watched the Gates of Hell. It is a massive, three-headed "Demon-Dog".
- The asteroid 1865 Cerberus along with the Plutonian moon Kerberos are named after him.