A large, green monster that invaded the playhouse. He resembled a giant eyeball, had two mouths and one leg, and spoke his native language. However, Roger's native language was incomprehensible to Pee-wee until he wished he could understand the monster (at which point he learned his name in English).
During this episode, Roger talked to his mother on the Picture Phone; during the conversation, Roger's mother said the Secret Word in their language, at which point they both screamed while a bunch of symbols appeared on the screen. At the end of the episode, Roger left the Playhouse with Pee-wee on the back of Pee-wee's scooter. Roger made another appearance in the "Pajama Party" episode.
First appearance was in Monster in the Playhouse.