At least in my group of friends (none of whom actually play Pokemon, I should note), Jigglypuff is seen as the stupidest pokemon in SSBM. I mean, look at the glassy, unintelligent doll eyes, the blissfully ignorant smile which never leaves its face... We put Jigglypuff into matches just to hear him die ("Jigglllyyyyyyyyyyyyyyyyy..."). Yes, I probably sound like a horrible person after this post, but I had to give the background when I say that...
I find it absolutely preposterous that Jigglypuff held a medical doctorate.