On a side note I used to absolutely hate ZADR when I was younger and now I'm totally ok with it. I think seeing all the fanart and all the creative ways people use it softened me up to the idea. I don't ship it though ;3;
I also have a hilarious crack ship that my friend made up: Gir x Ms. Bitters You know because they both like the word doom. It would never happen in a million years but thats why its great. XD And I looked it up recently and there was no results, I guess we discovered a new ship.
Haha, I generally just like Sizz-lorr as a character and some cute art of Zim and Sizz I saw made me like the idea of the ship. I think I mentally said the same about a ship existing the first time I saw GaMr. It's awesome how many different pairings fans make.
Oh lol. I do ship that too. So confusion won't happen in my headcanon I will have the come up with a new abbrivation for Gir and MiMi since I put Gaz and Matthew together as GaMr (because games and Gaz being a gamer) in my IZ headcanon. o3o