|This article belongs to the Reboot Timeline|
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 not as strong as a Tetramand due to the asymmetric body of the fusion and not being pure. He also has shown higher intelligence, presumably coming from his Galvan half.
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.
- Grey Arms first appeared in Riding the Storm Out, where he prepared to battle the Weatherheads but was instantly defeated by them.
- Riding the Storm Out (first appearance)
Naming and Translations
|Italian||Materia Grigiax2||Translation of English name|
|Portuguese (Br)||Braços Cinzentos||Translation of English name|
|Russian||Силаноид||Translation of English name|
|Spanish (HA)||Brazos Grises||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 Timeline.
- Similar to Stink Arms and Fourmungousaur, Grey Arms is a Tetramand hybrid.
- Similar to Diamond Matter, Grey Arms is also a Galvan hybrid.
|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||Goop • Jetray • Way Big|
|Introduced in Season 5||Big Chill • Bloxx • Buzzshock • Chromastone • Ripjaws • Spidermonkey • Surge|
|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|
|Omni-Naut Aliens||Heatblast • Jetray • Humungousaur • Shock Rock|
|Fusion Aliens||Amalgam Alien • Amalgam Ben • Grey Arms • XLRArmBlastDiamondHeat|
|Non-Canon Aliens||Banana Alien • Black Hat Alien • Hotdawg • Mole-Stache • Scooter Alien|
|Non-Canon Fusion Aliens||Omnitrix Glitch Fusion • Diamondhead-Humungousaur Fusion • Rath Arms • Shock Blast|