The Munchkins are small, humanoid creatures that reside in the Land of Oz.
The Munchkins appear in the coronation scene along with many other Oz characters from the books.
In the Muppets' version of the Wizard of Oz, the Munckins resemble rats. They were formerly oppressed by the Wicked Witch of the East, but were freed from her tyranny by Dorothy Gale when her double-wide trailer crushes her to death. Tattypoo is the protector and friend of the Munchkins, dropping in frequently for visits and rounds of cuddles. Glinda also drops in from time to time, though she seems to have a more distant relationship to them, displaying at best tolerance rather than affection.
The Munchkins are first mentioned when Zelena see's Sneezy and mistakes him for one. They make their first appearance in the episode "Our Decay". Having informed a now adult Dorothy Gale of Zelena having taken over Oz, she arrives to sop her. Zelena in retaliation visits them to find out who informed Dorothy she was alive. A Munchkin named Boq speaks out which causes Zelena to use her powers to turn him into ash and she then threatens the others before Hades arrives. Revealing his identity to the Munchkins as the Lord of the Underworld cause them to flee.