Snoopy

So far he appeared in Misery, My Sweet Babboo, The Great Pumpkin, and Ren McCormack

The Great Pumpkin
He appeared at Linus' grave.

Misery, My Sweet Babboo
Charlie Brown asked Snoopy to look for Linus. He puts on a batman costume and accuses Charlie Brown's sister Sally of capturing Linus. Sally laughs with Snoopy before getting repeatedly smacked with a shovel and thrown down the basement and left for dead.

Ren McCormack
He got drunk and started dancing