The Boondocks

There aren't really any true transformations on this show, but there are a couple of noteworthy episodes that could provide clips for this site:

"Stinkmeaner Strikes Back": In which Tom Dubois gets possessed by the ghost of Colonel Stinkmeaner. There are three different scenes involving Stinkmeaner taking control of Tom, all of which could easily be placed in the Mind Transfer category:
https://www.youtube.com/watch?v=6p4c9wRBsy0 (WARNING: PROFANITY)
https://www.youtube.com/watch?v=2KpES1G_5jg (WARNING: PROFANITY)
https://www.youtube.com/watch?v=VWxna9_sMhY

"The Itis": A woman named Janet gains (and later loses) a massive amount of weight, going from svelte to obese and back. I suggest this clip: https://www.youtube.com/watch?v=iFZ4KJVAgfM