Codename: Kids Next Door S04 E21 Operation D.O.D.G.E.B.A.L.L.

The powerful Dodgeball Wizard believes that adults are better at playing dodgeball than kids, so when he learns of "the one called Beetles," a kid who is a greater dodgeball player than he is, he becomes determined to destroy his rival. And that rival is, apparently, Numbuh 4!