Woodstock

Woodstock is a character from the Peanuts franchise. He appeared in the Robot Chicken skits The Time of the Great Pumpkin and Misery, My Sweet Babboo.

The Time of the Great Pumpkin
In this skit, Woodstock is first seen at Linus' burial alongside Snoopy who howls to honor Linus, who got killed by The Great Pumpkin, which he summoned using black magic, as he was tired of the great pumpkin never showing up on Halloween.

Between Day 2 and Day 10, Schroeder, Pigpen, Franklin, Peppermint Patty, Snoopy and Lucy is all killed by the Great Pumpkin, and only Charlie Brown survives. After defeating the Great Pumpkin, Charlie thinks about his deceased friends. We then see all the dead children (except for Marcie and Lucy) dancing in hell with a demon. Woodstock is also present, sitting on Schroeder's piano, having been eaten and killed by the terryfing monster.

Misery, My Sweet Babboo
In this skit, Woodstock is seen dressing up as Robin alongside Snoopy who dressed up like Batman after Charlie Brown asked Snoopy to find Linus who had gone missing. While Snoopy later confronts Sally and is killed by her, Woodstock is never seen in the segment again after he and Snoopy dons their costumes.