The Emperor is a jolly purple lump who couldn't be happier to have Sheen Estevez on Planet Zeenu. In the Emperor's eyes, Sheen is the mythological bearer of peace, prosperity and joy whose arrival is foretold in the Book of Great Goodness. Sheen is a miracle! And even though any Jimmy Neutron fan will tell you that Sheen is far from miraculous -- he's kind of a dope! -- somehow he manages to live up to the Emperor's heroic expectations, defeating terrible beasts and bringing happiness to Zeenu. When he sees what the Earthling is capable of, the Emperor not only promotes Sheen to top advisor, but he also tries to set him up with Princess Oom His daughter! Unfortunately these actions make the Emperor's former top gun, Dorkus, VERY unhappy.
Sheen crash lands Jimmy Neutron's 'borrowed' rocket on Zeenu, has tons of misguided adventures and deals with the planet's weird creatures and a stranded NASA-trained, talking chimp who joins Sheen on the quest to get home.