The Space Kook is one of the most recurring antagonists of the Scooby-Doo franchise.
Space Kook is a ghostly skeletal phantom-like space-man monster in a spacesuit, Space Kook' eyes are pale yellow colored.
Scooby-Doo! Where Are You!
The Space Kook first appeared in the episode Spooky Space Kook, where he was the titular sole antagonist and a disguise used by Henry Bascombe who was trying to get land cheaply. When Scooby-Doo trapped Space Kook in an air tunnel, Space Kook's costume started to fell off, revealing it was Henry Bascombe in a costume.
Scooby-Doo! Nights of 100 Frights
Space Kook appears as a common villain of the game. He has a gun that shoots rays, and unlike all the other monsters in the game, he can regenerate after being killed.
Scooby-Doo! 2: Monsters Unleashed
In the second live-action movie, Space Kook appears as a costume and was in the Coolsonian Criminology Museum. Unlike a lot of the monsters, the Space Kook wasn't brought to life.
Scooby-Doo! Who's Watching Who?
He is the third boss in this game.
Scooby-Doo! Mystery Incorporated
In various episodes, Space Kook's costume is presented by Velma in the Crystal Cove monster museum along with The Ghost of Captain Cutler, The Miner 49er, and Charlie the robot. In one episode, it was stolen by some other aliens.
Scooby-Doo! Mask of The Blue Falcon
Scooby-Doo! WrestleMania Mystery
The Space Kook's most recent appearance in the Scooby-Doo franchise was during the opening credits of WrestleMania Mystery and the My Friend Scooby-Doo App.