Based on a RP I did with  MordredTheBraixen, this is Will after eating way too many pokepuffs... ^^;
Will loves, and I mean loves, Pokepuffs. He likes to eat them a lot sometimes and more rarely goes on massive Pokepuff binges like he did here. Pokepuff smears and crumbs are staining his bare white body, and his shirt and diaper couldn't hold him for long... X3
You can barely tell he's a Sylveon like this due to his ribbons sinking into his fat body, he's more of a fluffy slug with all that weight