Tik-Tok is a clockwork man.
Description
Tik-Tok was a mechanical man living in the Land of Oz when he was encountered by a girl named Dorothy Gale. He joined her on her adventures and eventually succeeded in helping her defeat the Nome King. He was briefly turned into a green medal by the king during the confrontation, but Dorothy managed to turn him back by guessing that the medal was him. After Dorothy returned to the U.S.A., Tik-Tok presumably lived more or less uneventfully in Oz for some time. At an unknown point in time, Oz and all of it's inhabitants were forgotten and transported to the Wasteland, where the Mad Doctor used Tik-Tok's design as a model for one of his minions, a robot called a "Tik-Tok Basher". The real Tik-Tok presumably still lives somewhere in Wasteland.
Behind the scene
Tik-Tok (or at least the version of Tik-Tok that is canon to the Disneyverse) first appeared in 1985 in Return to Oz. The robot known as a "Tik-Tok Basher" first appeared in Wasteland in "Epic Mickey 2: The Power of Two".