|This article belongs to the Reboot Continuity|
Grey Arms has the body of Four Arms, but the head of Grey Matter (although much larger). He has three eyes, two of which are those of Four Arms and one is a large Grey Matter's eye. He has one arm of Four Arms on his right side and 3 arms of Grey Matter on his left side. His right leg is Grey Matter's and left is Four Arms'. Grey Arms also has the upper head stripe of Four Arms, and his lower jaws is the same structure as a Tetramand. Unlike Grey Matter or Four Arms, Grey Arms has wrinkles on his upper lip.
Grey Arms wears the Omnitrix symbol on his chest.
Powers and Abilities
Grey Arms, being half Tetramand/half Galvan, has enhanced strength, albeit he's not as strong as a Tetramand due to the asymmetric body of the fusion and not being pure. He also has shown higher intelligence, probably coming from his Galvan part.
Due to his asymmetric body and having one functionally strong arm, he can't use his enhanced strength. In addition, he suffers from imbalance issues.
- Riding the Storm Out (first appearance)
Naming and Translations
|Italian||Materia Grigiax2||Translation of English name|
His name is the combination of Grey Matter and Four Arms.
- Grey Arms is the first fusion alien in the reboot continuity.
|Introduced in Season 1||Cannonbolt • Diamondhead • Four Arms • Gax • Grey Matter • Heatblast • Overflow • Stinkfly • Upgrade • Wildvine • XLR8|
|Introduced in Season 2||Rath • Shock Rock|
|Introduced in Season 3||Humungousaur • Slapback|
|Introduced in Season 4||Jetray|
|Omni-Enhanced Aliens||Cannonbolt • Diamondhead • Four Arms • Grey Matter • Heatblast • Overflow • Stinkfly • Wildvine • XLR8|
|Omni-Kix Aliens||Cannonbolt • Diamondhead • Four Arms • Heatblast • Humungousaur • Jetray • Rath • Shock Rock • Slapback • XLR8|
|Fusion Aliens||Amalgam Ben • Grey Arms • XLRArmBlastDiamondHeat|
|Non-Canon Aliens||Banana Alien • Hot Dog Alien • Mole-Stache|
|Non-Canon Fusion Aliens||Omnitrix Glitch Fusion • Rath Arms • Shock Blast|