The Marvel Universe is Crazy

Fantastic Four Roast #1

What If? #34

Marvel No-Prize Book #1

Obnoxio the Clown vs. the X-Men #1

Marvel Fumetti Book #1

Fred Hembeck Destroys the Marvel Universe #1 (via House of Hem #1)

Power Pachyderms #1

Note: As of now, this is a collection of mostly humor-focused one-shots, largely taking place outside of the core Marvel Universe. I'm not currently including any issues from regular series, notably the issues from the Assistant Editor's Month of 1984 (which included, among other stories, the Avengers on David Letterman and Aunt May becoming a Herald of Galactus). That could change in the future.