Cartoon Network has featured Generator Rex and Ben 10 in their and DC Comics's Cartoon Network: Action Pack comic books. Two 3D picture books (featuring cardboard 3D glasses) ""EVOs and Heroes,"" a whole analysis on characters and their abilities and ""The Swarm,"" an adaption of the episode of the same name, where Rex must fight insect E.V.O.s that feed on metal, have also been released. For beginning readers, the story ""Leader of the Pack"" is also based on an episode and features Rex and Bobo being captured and locked in an underground prison cell.