The Mordred

Monster #: 900,003

What Is It: A monster disguised as an alien landscape.

What Does It Want: To trap passing spaceships.

What, They Don't Notice The Tunnel Looks Like a Mouth: Look, you've seen "The Empire Strikes Back," right.

Yeah: Same deal.

Oh: Mmhmm.

Isn't That a Movie: Movies can be true too you know!

The Blue Glump

Monster #: 89,067

What Is It: A very gloomy monster.

What Does It Want: To not be so gloomy.

Why Is It So Gloomy: He doesn't know.

Boy, That's Too Bad: Yeah, tell him about it. No wait, don't.

The Slinger

Monster #: 467

What Is It: Some kind of outlaw-type that lives on a distant planet.

What Does It Want: To be left alone so it can do its thing.

What Is Its "Thing": Robbery, murder, arson, etc.

But It Shouldn't Be Left Alone To Do Those Things: Well, you and it are just going to have to agree to disagree.