The Yellostone Monster

Cast(in order of appearance): Dr. Brainstorm, Jack, The Yellostone Monster, Calvin Jacobson, Hobbes Jacobson

Plot
Dr. Brainstorm creates a Godzilla-like monster in order to terrorize the city. Calvin and Hobbes save the city using the transmogrifier gun.

Transcript
The Yellostone Monster Transcript

Trivia

 * This marks the debut of Dr. Brainstorm, Jack, and the Yellostone Monster.
 * However, this episode is the only episode where the Yellostone Monster is seen, but he was mentioned by Dr. Brainstorm in Camp Tripping.
 * Dr. Brainstorm would soon be the main antagonist in Calvin and Hobbes the Animated Cartoon Adventures.
 * This is the first episode to introduce the transmogrifier gun.