|Affiliations|| Ben Tennyson|
|Voice Actor||Phil LaMarr|
|First Appearance||From Hedorium to Eternity|
Jonesy is a flashback character who first appeared in From Hedorium to Eternity.
Jonesy has the typical look of a 10-year-old school kid. His clothes vary in three different colors: blue, red and white. He wears red and white shoes, blue jeans, a red shirt with white and blue stripes and a blue baseball cap with a "J" in a white circle on it. Jonesy has big dotted eyes, short black hair, thick lips and a flat nose.
He is a normal kid who goes to school. However he knows Ben's identity and Lucy's, Cooper's and Gwen's powers. He also appears to have some knowledge about aliens. He helps Ben and his team to defeat Zs'Skayr.
He seems to get on Lucy's nerves as when the kids were sneaking around the haunted house, he gave away her position because he was worried about her safety and she yelled at him to stop yelling while they were falling.
Ben 10: Omniverse
- From Hedorium to Eternity (first appearance; flashback)
Jonesy is a homage to one of Cartoon Network's executives, Brian Jones.