Toy Master is a one-time villain from the Cartoon Network original series Teen Titans Go!, only appearing in the episode "Collect Them All". He is an obsessive collector of Teen Titans Go! figurines.
The Teen Titans were collecting toy figurines of other characters from their own show. Robin did not get in on the hype train and let the others go nuts with their own pointless interests. Just then, a giant flash of light happened, which led to the capture of Starfire, Cyborg, Beast Boy, and Raven. They all got turned into plastic figurines and got blasted away in four different directions. All that was left behind was a note. Robin read it and it was a note from "Toy Master", who said that he needed to go on a wild goose chase to collect all of his friends.
Robin was able to muster Starfire, Cyborg, and Beast Boy, but all that was left to collect was Raven. The only thing he had in her place was a knockoff version of Raven, while the Toy Master had the real Raven. Robin had to send out his collectibles to fight with Toy Master's collectibles, which were Superman, Batman, Wonder Woman, The Flash, and Green Lantern. Toy Master's collectibles won the fight and Toy Master claimed all of Robin's collectibles. Robin was able to defeat Toy Master by saying that he didn't care about Toy Master's collectibles, which made them worthless. Toy Master freaked out over this and exploded. All of his toys were automatically turned back to normal and they all returned to Robin.