Super.
My avatar is Dryden Fassa from The Vision of Escaflowne.
Seven colors in the rainbow. Seven letters in the word "rainbow". Coincidence? I think not.Muggle. I haven't seen the show, but he doesn't seem to have any powers or combat skills.
Harold The Scarecrow from Scary Stories to Tell in the Dark
All witches, all skeletons, all jack O Lanterns, gather round your TV set, put on your masks, and watch...watch the magic pumpkin, Watch...Iron Weight. Joker may be scrawny looking, but he can definitely hold his own.
The "Halloweenie" version of Miss Bitters from Invader Zim halloween episode, Invader Zim S 1 E 25 Halloween Spectacular Of Spooky Doom.
All witches, all skeletons, all jack O Lanterns, gather round your TV set, put on your masks, and watch...watch the magic pumpkin, Watch...Possibly Iron, as while Pokemon trainers rely on their mons to do the fighting I think Cynthia is physically active enough.
Space Kook from Scooby-Doo, Where Are You!. Like every villain, he's a human in a suit rather than a true supernatural being.
All witches, all skeletons, all jack O Lanterns, gather round your TV set, put on your masks, and watch...watch the magic pumpkin, Watch...Iron Weight(apparently he's from Red Dead Redemption)
Tim Barnett(transforming into an apple tree)
All witches, all skeletons, all jack O Lanterns, gather round your TV set, put on your masks, and watch...watch the magic pumpkin, Watch...

There's probably similar threads before, but to tie into a page we have on this site, how about one where we judge what level an Avatar would fall on the Super Weight Tier list? If you feel nobody will recognize your avatar, you can link their name and the work they're from.
First up is the little known Lord of Purity, Canaletto, from Ōban Star-Racers.
All witches, all skeletons, all jack O Lanterns, gather round your TV set, put on your masks, and watch...watch the magic pumpkin, Watch...