I'm Your Moon by Jonathan Coulton

dudes Pluto was the shitz, i loved that guy, and il beat anyone who doesn't!

It's sad but true Pluto.  As a planet you were indeed very small. But as an asteroid, you are huge. It's better to be the biggest of something less then the smallest of something greater.

No longer a puny planet, you are the King of the Kuiper belt now. Aah and dont worry about Eris, he is just your bodyguard. :)

Pluto, you're still a planet to me! D=

in mythology Pluto just hanged around in his under world and was very anti social and his wife had to be forced by his three brothers(Saturn Neptune and Mercury) just to visit him once a year and he hated it and secretly wished he could be like the other gods who had friends who wanted to visit him and not have to be brought down by his older brothers

hate to correct you, but it is jupiter and neptune who were pluto's brothers. mercury was his nephew and saturn was his father.

I smell a sitcom!

im writing it right now he will live in an apartment building and his next door neighbor? Jerry Seinfield

With Wil Wheaton as the comically incompetent landlord on the run from the law.

Pluto always looked so lonely to begin with...

Shut up! I'm not crying.