I really wonder... Who was the first person to think it would be cool to put Pooh in every single good and bad movie or television show, and who could forget that a stuffed teddy bear can be related to an actual bear!?
Pooh's Adventures. A meme that sounds quite regular for a strange mind at first, but when you find out that they have plans for a family-friendly "Pooh's Adventures of Avatar", then everything is ruined.
Join me as I take on the worst and most bizarre of these fan-created crossovers, watching as much as I can and browsing the wiki to see what other ideas they have up their sleeves (and won't bother to complete).