The Succubus (a.k.a. Chef's Mama) - S3-E3
Continuity mistake: Kenny's head is completely smashed when he is attacked in the church during Chef's and the succubus' wedding, but it is whole again when Cartman brings it to the optometrist to get an eye transplant.
The Succubus (a.k.a. Chef's Mama) - S3-E3
Continuity mistake: When Stan, Kyle and Kenny go to Chef's house to tell him about Veronica, they can't talk to him so they sit down opposite Chef's parents. When Kyle says, "We have to talk to him," he and Stan have swapped places.
The Succubus (a.k.a. Chef's Mama) - S3-E3
Other mistake: Cartman says, "What? What happened you guys? Is Kenny okay?" The bandages only covered his eyes, not his ears, so even if he's blinded by his bandages, he still should have been able to hear Stan shouting, "Oh my God! She killed Kenny!" and Kyle's reply "You bastard!"
Answer: He appears in at least 5 other episodes, but usually just as a background character. He can be seen at Cartman's party in "Immaginationland". He was also one of the kids trying out to replace Butters in the "Professor Chaos" episode.
Bishop73