|This article belongs to the Classic Continuity|
Ken wears a black and white shirt. The cuffs near his leg as well as his belt are green and he has black pockets. The circle around his belt buckle is white. His eyes are dark green. His skin tone is slightly tanned, a trait which he inherited from Kai.
As Spanner, he wears a white armored jumpsuit, along with a green scarf and a white helmet. He appears to have some-sort of equipment on his wrists.
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In Something Zombozo This Way Comes, he appeared as a mysterious white suited hero and protected Ben from getting hit with a shoe from one of the Zombie Clowns. However, by the time Ben could turn around to see who was behind him, he vanished in a green light.
In Animo Crackers, Kenny appears again as Spanner and attacked Dr. Animo, along with Animo's future self, revealing his alias. When Ben arrived, the Animos split up, and Spanner immediately pursued the future Animo. Both he and Ben were subdued by this Animo. Spanner then instructed Ben to contact Lieutenant Steel, which led Ben to discovering that Steel's group was under attack. Ben, Rook, and Spanner arrived at the scene, Ben using Gutrot to defeat the Animos. Spanner then teleported away with the future Animo, and Ben wondered who he was.
In Cough It Up, Spanner appears frequently to aid Ben and Rook while they defend Argit. Because he and Jimmy Jones, who also appears in the episode, never appear at the same time (and he also seems to be a fan of Jimmy), Ben and Rook believe that Jimmy is, in fact, Spanner, though he states he doesn't even know who Spanner is.
In Fight at the Museum, he revealed himself to be from the future, where Ben and Kai are married. While trying to save the first alien artifact that Kai and her grandfather found together, he tries to make sure Ben and Kai end up together at all costs. Knowing that it's for the greater good, Spanner steals the emptied artifact and returns to the future where he sees that Ben and Kai are still married.
In The End of an Era, Spanner returned the future Animo to his present, then assisted Ben 10,000 in battling Maltruant, before revealing himself to in fact be his son Kenny, who wanted to prove himself to be a true hero after Ben took away his Omnitrix, and was given a device by Professor Paradox that would allow him to travel through time.
Powers and Abilities
Ken possesses a technologically advanced, full-body suit (provided by Professor Paradox) that is armed with wrist-mounted blasters and jet-boots, which allow him to fly. He also possesses a device that allows him to travel through time.