Ben 10 Fan Fiction Wiki
Ben 10 Fan Fiction Wiki
General Information
Species Cerebrocrustacean
Home World Encephalonus (destroyed)
Encephalonus II (destroyed)
Encephalonus III (destroyed)
Encephalonus IV
DNA source Magister Psychobos
Body Crustacean
Powers and Abilities
Abilities Enhanced Intelligence
Enhanced Strength
Enhanced Durability
Enhanced Dexterity
Enhanced Agility
Electricity Generation
Electrical Telekinesis
Force Field Generation
Electrical Telepathy
Wall Scaling
First Appearance Mad's Test

Braincrab is the Yellow's Omnitrix's DNA sample of a Cerebrocrustacean from the planet Encephalonus IV in Yellow.


Braincrab looks like the Omniverse version of Brainstorm, however he is more of a salmon color for his base body, and his eyes, belt, striped and Omnitrix.

Transformation Sequence

The background is yellow, and the Omnitrix disappears from Yellow's wrist. His hands and fingers soon create a claw on both arms. The screen moves to Yellow's head, which grows massivley. His eyes go full yellow as spikes grow on his eyebrows and around his mouth. Then, the screen moves to his feet, which both his feet split, creating four legs that soon shape into crab-like feet. Finally, the screen does a 360 rotate around Yellow, with the omnitrix on the belt, showing the full transformation of Braincrab!

Powers and Abilities

Like all Cerebrocrustaceans, Braincrab has Enhanced Intelligence, Strength, Durability, Dexterity and Agility. He also has Technokinesis, Mnemokinesis and Electrokinesis. With his Electrokinesis, Braincrab can generate electricity, use telepathy and even use telekinesis. Braincrab can also generate forcefields. Finally, Braincrab can levitate and scale walls.


If Braincrab's head shell is closed while releasing electricity, his brain will be injured.

He's vulnerable to the Cerebrocrustacean's natural predator: The Vicetopus.


When Yellow was a young kid, he, Gwen and Max went to Encephalonus III (previous home of the Cerebrocrustaceans, now destroyed) when Magister Psychobos sent a distress signal. There was a mysterious man sending troops down to attack Encephalonus III, and Magister Psychobos needed the Tennyson's help. They all fought against the soldiers, but unfortunately, one soldier stabbed Magister Psychobos in the heart, killing him. His dying wish was to give Yellow the DNA Sample of the Cerebrocrustacean. He did as such, giving Yellow his fifth Omnitrix alien, Braincrab.

Years later, Yellow uses Braincrab more often and even beat Mad Ben in his Upgrade form while as Braincrab.