http://www.youtube.com/watch?v=MBg1hK5xCNE Mmm-hmm. Enjoy this video of pure crack that I made.
Main Pairings:
ZaDR
RaPR

Crack Pairings included:
ZaZR (Zim and Zim Romance. I support it but others might find it to be crack)
ZaPMR (Zim and Professor Membrane Romance, which I actually support too)
PaPMR (Purple and Professor Membrane Romance. PURE CRACK)
And there's some hinted RaZR and SLAZR (Sizz-lor and Zim) near the end.
...
I'm messed up. :p