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Encephalonus IV is the home planet of the Cerebrocrustaceans and the Vicetopus.


Main Timeline

Inside Dr. Psychobos lab

Encephalonus IV has tall trees and a greenish sky.

Vilgax Attacks Timeline

Encephalonus IV in Vilgax Attacks DS

Encephalonus IV is a large planet filled with massive towers and facilities built upon rocky mountains and canyons. Coral can be seen on rock walls and mountainsides.

The buildings' interiors are mostly filled with dark rooms, long corridors, bridges and computers.

Technology present on Encephalonus IV is very futuristic and advanced, in accordance to the fact that Cerebrocrustaceans have extremely high intelligence. Most of the machinery and transportations present include jet-powered, interchanging platforms; laser beams used to activate switches that open doors, or turn on other machinery; high-speed subway trains that are powered by electrical coils; numerous satellites and pylons, plus advanced computer systems.

It is suggested that the numerous puzzles and computers present on Encephalonus IV are used to test the knowledge of the Cerebrocrustaceans, and it is a daily thing in everyday life to exercise their brains.

Lightning and thunder are frequently roaring in the dark, cloudy sky, though rain has not been seen.


Main Timeline

The nearby planets of Encephalonus I, II and III, which share a sun with Encephalonus IV, comprising their own solar system, have long been depleted of their own natural electrical resources by the predecessors of the Cerebrocrustaceans. Learning from the mistakes of their ancestors and determined not to repeat past disastrous errors, the Cerebrocrustaceans have evolved to be able to generate their own electrical storms using only the power of their minds, contributing to their homeworld, rather than depleting it.[merch 1]

Encephalonus IV was seen in Of Predators and Prey: Part 1 when Malware visited Dr. Psychobos.

Vilgax Attacks Timeline

Encephalonus IV is the fourth level in Ben 10 Alien Force: Vilgax Attacks.

Notable Inhabitants

Vilgax Attacks Timeline

Notable Visitors


The name of the planet comes from the word "encephalon", meaning "brain".


  • Encephalonus IV has at least two moons.[1]
  • Originally, Encephalonus IV was a gray, cloud-covered planet with lightning bolts constantly ripping through the sky in an unending electrical storm of spectacular cumulonimbus activity unrivaled by any in the universe.[merch 1] These storms were the main source of power for the planet.[merch 2] This was retconned in Omniverse, where it is shown that the planet has relatively normal weather.[1]



Celestial Bodies
Seen Planets
AldabraAnodyneAnur TransylAranhaschimmiaAugstakaCoda CodaEarthEncephalonus IVGalvan PrimeIncursean HomeworldKhorosLepidopterraMikd'ltyPantophagePeptos XIPeptos XIIPetropiaPisccissPlutoPrimusRevonnahSulcusT.K.Terminus IIITerraexcavaTurrawusteVilgaxiaXenon
Unseen Planets
AeropelaAndesiteAnur G'rrnayAnur KhufosAnur MillganAnur OrmerowAnur PhaetosAnur VladiasAppoplexiaArburiaAul-TurrhenChalybeasChordelta Star World BetaColeop TerraFlors VerdanceGilli-Perambulous PromenadeHathorJ'HambaH'JKeplorrKinetKiusanaKylmyysLewodaMethanosMolluskusNemunimos IVPattersoneaPolyominusPrypiatosRinga MorrSangerosiaScalpascSightraSotoraggTechadonTerradinoTesslosThalassiaViscosiaVulcanVulpinX'Nelli
Sapient Planets Satellites Locations in Space
Galilean (Gravattack, Orbit Man)Evolved Galilean (Ultimate Gravattack) Galvan BLuna LoboMoonMyceto Great Vault of SulcusEdge of the Galaxy IncarceconNull Void IncarceconPerplexahedronSpace Cafe
Stars Star Systems Galaxies
Pyros Anur SystemGalvan Star System Andromeda GalaxyMilky Way
Other Celestial Bodies
Cosmic StormsForge of CreationNosedeen QuasarTeslavorr
Retconned Non-canon
ChroniaOsmosOsmos V CorundorIgnisLignumMor' OtesiPoiana LüncasZvezda