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Tetrax Shard is a Petrosapien bounty hunter who first appeared in Omni-Tricked: Part 2.


Tetrax wears a shiny grey suit along with a black helmet with a small, teal triangle on it, shoulder pads and boots. There are glowing teal colored lines in his helmet and shoulder pads. Tetrax's Petrosapien physiology can manifest through the armor, allowing him to use his powers without removing it.

Underneath his helmet, he has an appearance similar to that of Diamondhead.

As of Mutiny for the Bounty, Tetrax is now missing his left arm.


As a bounty hunter, Tetrax's motivation is solely based around money. This can lead him from helping Ben Tennyson in the fight against Vilgax to actively hunting Ben down on Azmuth's behalf.

Tetrax believes patience is the key to success and scolded Kraab for wanting to attack Ben early on.

Tetrax is shown to be quite arrogant, viewing himself as the leader of the bounty hunter trio and thus deserving of a prestigious leadership money share.

Tetrax displays a sadistic sense of humor, responding to Ben's horrified claims of letting his cousin Gwen fall to her death as him simply "letting her go", before laughing about it.

Although he initially referred to himself in the third person, he switched to using first person later on.[1]


Tetrax was introduced in Omni-Tricked: Part 2, when he attacked Ben and Phil along with SixSix and Kraab. The trio were hired by Azmuth to retrieve the Omnitrix from Ben, so as to prevent Vilgax from getting hands on it again and completing himself.

In Omni-Tricked: Part 3, Tetrax came through a portal along with SixSix and Kraab to fight Vilgax. However, when the trio was defeated they left.

In Bounty Ball, he was watching Ben as he moved the train with Omni-Enhanced XLR8, he wanted to get the Omnitrix from Ben Tennyson because his client Azmuth wants the Omnitrix back from Ben. He, alongside Kraab and Sixsix, captured Ben as Grey Matter. Grey Matter was able to trick him into fighting against his allies.

The bounty hunters catch up with Ben after his escape. Tetrax captures Gwen and threatens to throw her off the train if Ben doesn't give up. After Ben, as Shock Rock, gives up, Tetrax drops Gwen off the train (who survived). Soon he is knocked off of the train, revealing his species to Ben.

In Mutiny for the Bounty, Tetrax captured Ben only to team up with him to defeat Kraab and SixSix. He lost his left arm due to Kraab ripping it off. After Kraab and Sixsix were defeated, Tetrax left in his ship, this time being on friendlier terms with Ben.

In Ben 10 Versus the Universe: The Movie, Tetrax appeared during Ben's trial and lied to Milleous, leading to Ben being sent to the Null Void. After Ben escaped from the Null Void, Ben defeats Textrax as Diamondhead. But after realizing Tetrax's client was Azmuth all long, Diamondhead decides to let Tetrax return to Petropia rather than hand him over to the Incurseans.

Powers and Abilities

As he is a Subsapien, Tetrax shares many of the same abilities as Diamondhead.


Textrax carries a laser blaster.


Tetrax's large size prevents him from easily maneuvering himself in tight spaces, such as a train's cabinet doors.[1]

Just like other Subsapiens, he can be harmed by loud sounds.

Due to the loss of his left arm, Tetrax is very limited on many occasions.

Some of Tetrax's attributes to not appear to be on the same level as Diamondhead, as the latter was able to defeat him despite the former's experience with his Subsapien abilities.[2]


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