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XLRArmBlastDiamondHeat is a fusion of XLR8, Four Arms, Heatblast, and Diamondhead.


He has XLR8's legs and tail, the latter of which has a mace on the end and spikes along the top, made from Diamondhead's crystals. His lower body is XLR8's with Four Arms' general proportions and arm count, the lower set keeping the structure of the ones belonging to Four Arms, but made with Heatblast's lava, with his upper spikes being made of flames. His upper body has Four Arms' general shape, and his upper set of arms belong to Four Arms, but he has gauntlets, spiked shoulder pads, and upper body armor, all made from Diamondhead's crystals. His head is Four Arms', but the mouth and crystal structure around it belong to Diamondhead.

XLRArmBlastDiamondHeat bears no Omnitrix symbol, as he was used while within it.

Powers and Abilities

He has the combined strength of Four Arms and Diamondhead, with the latter's durability and crystal generating ability. He has XLR8's speed and Heatblast's fire generation. He also has his tail mace.


His Pyronite quarter can be extinguished by water.

His Petrosapien quarter can be harmed by sonic vibrations.

His Kineceleran quarter can be affected by Earth poison.


XLRArmBlastDiamondHeat was created in Innervasion Part 5: High Override by Ben using XLR8, Four Arms, Heatblast, and Diamondhead's alien pods in the Omnitrix's loading bay to fight the High Override.

In Omni-Copped, XLRArmBlastDiamondHeat appeared in a flashback.


Ben 10

Season 2

Season 3


  • This transformation was referred to as Multi-Alien in a video released on Cartoon Network's YouTube channel.
Original Aliens
CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyUpgradeWildvineXLR8
Introduced in Season 1 Introduced in Season 2 Introduced in Season 3 Introduced in Season 4
Gax RathShock Rock HumungousaurSlapback Eye GuyJetrayRipjawsWildmutt
Omni-Enhanced Aliens
CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyWildvineXLR8
Omni-Kix Aliens
Diamondhead • Heatblast • Humungousaur
Fusion Aliens Non-Canon
Amalgam BenGrey ArmsXLRArmBlastDiamondHeat Hot Dog AlienOmnitrix Glitch Fusion
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