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Amalgam Alien is a form Ben transforms into when he loses control of his emotions.


Amalgam Ben's appearance is a mix of Four Arms, Heatblast, Diamondhead, Cannonbolt, Rath and Slapback. From what can be seen of his body, it appears like Rath's but with Cannonbolt's arms and underbelly. Around his neck is Rath's mouth that opens up to the Heatblast flame that surrounds his head. His head is that of Four Arms without his head stripe, and his two right eyes replaced by Slapback's eye and eyebrow. He also has Diamondhead's jaw and right back spike.

Powers and Abilities

Amalgam Alien is capable of breathing fire, this is the only power shown during his transformation.



Ben 10

Season 4

Introduced in Season 1 CannonboltDiamondheadFour ArmsGaxGrey MatterHeatblastOverflowStinkflyUpgradeWildvineXLR8
Introduced in Season 2 RathShock Rock
Introduced in Season 3 HumungousaurSlapback
Introduced in Season 4 GoopJetrayWay Big
Introduced in Season 5 Alien XBig ChillBloxxBuzzshockChromastoneRipjawsSpidermonkeySurge
Omni-Enhanced Aliens CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyWildvineXLR8
Omni-Kix Aliens CannonboltDiamondheadFour ArmsHeatblastHumungousaurJetrayRathShock RockSlapbackXLR8
Omni-Naut Aliens HeatblastJetrayHumungousaurShock Rock
Fusion Aliens Amalgam AlienAmalgam BenGrey ArmsXLRArmBlastDiamondHeat
Non-Canon Aliens Banana AlienBlack Hat AlienHotdawgMole-StacheScooter Alien
Non-Canon Fusion Aliens Omnitrix Glitch FusionDiamondhead-Humungousaur FusionRath ArmsShock Blast