Planet Sheen After sneaking into his best friend Jimmy Neutron's laboratory and finding Jimmy's secret rocketship, Sheen Estevez accidentally blasts himself into outer space. Four million and 1 lightyears away, Sheen crashes on Zeenu—an odd planet inhabited by aliens called Zeenunians. Soon after the crash, Sheen wants to go home, but his rocketship was smashed when he flew into a house belonging to a Zeenunian named Dorkus (whose name is ridiculed by Sheen).