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Leo the Party Monster appeared during the late 1980s on Sesame Street. This loud monster is obsessed with partying -- any time, anywhere.
The puppet used for Leo was later reworked as Ruby.
- Grover's Just So-So Stories: "How the Monster Got His Fur" (1987)
- Monsters, Monsters! (1987)
- Oscar's Silly ABC's and Other Stories (1987)
- On My Way with Sesame Street Volume 1 (1989)
- On My Way with Sesame Street volume "Just Pretend" (1989)