Rotom is the only pokemon that I've ever changed the form of. I changed mine into heat rotom. I also have a shiny heat rotom that I traded for.
IIRC heat rotom used to be common in the 4th gen OU metagame.
I have a shiny Rotom that was traded to me, I dont now which forme I want it to be and Im too lazy to transfer any Pokemon to Gen 5. My shinies that are in Gen 4 might remain in HGSS forever.
Wash Rotom was, is and will be a pain forever (at least to me and my pitiful OU Team)
Super Mushroom Bros!
It is a good game but there are a few problems with it, but I do really like it.