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 wears the Omnitrix symbol on his chest.
Powers and Abilities
He is shown to still have the same intelligence as greymatter
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He is not strong and durable like Four Arms. He has only 1 arm that can help him when strength is required.
- In Riding the Storm Out, Grey Arms was defeated by the Weatherheads
- Riding the Storm Out (first appearance)
His name is the combination of Grey Matter and Four Arms.
- Grey Arms is the first fusion alien in the reboot.
|Ben 10 Reboot Aliens|
|Introduced in Ben 10|
|Cannonbolt • Diamondhead • Four Arms • Gax • Grey Matter • Heatblast • Humungousaur • Overflow • Rath • Shock Rock • Slapback • Stinkfly • Upgrade • Wildvine • XLR8 • Jetray|
|Cannonbolt • Diamondhead • Four Arms • Grey Matter • Heatblast • Overflow • Stinkfly • Wildvine • XLR8|
|Amalgam Ben • Grey Arms • XLRArmBlastDiamondHeat||Hot Dog Alien • Glitch Fusion|
|Omni-Kix Jetray • Omni-Kix Slapback • Omni-Kix Clockwork • Omni-Kix NRG • Omni-Kix Heatblast • Omni-Kix Four Arms|