Ben 10: Alien Swarm, Ben 10 Omniverse Wiki

Kevin drives his car to a garage where he is to meet alien tech dealers. He arrives and the dealer calls a motorcycle gang that has the tech. They show him tubes filled with alien nanochips. He asks what they are, but the dealer doesn't know. Ben and Gwen come out and Kevin shows him the chips. The Omnitrix reacts strangely to them. A member of the gang says that the team are Plumbers, surprising the team. She reveals herself to be Elena Valadis, an old friend of Ben's, surprising Ben and Gwen.

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