Space Ghost (character)

Space Ghost is an alien superhero and the main title character of the Space Ghost franchise. His voice was originated by Gary Owens.

Jellystone!
He will appear in the Jellystone! reboot.

Space Ghost Sells Out
In the Teen Titans Go! episode "Sidekick," Space Ghost is a member of DCUbook (a parody of Facebook), who has posted the message, "BOO."