As the rounds drag on in Zoofights, inevitably some competitors have to be...''[[CameBackWrong rebuilt]]''. Or sometimes...''[[GoneHorriblyWrong improved]]''. The results of this are invariably horrifying.

* The original Swanmass. A massive bundle of flesh that rolls along the ground, absorbing all organic matter in its path. This borderline EldritchAbomination became so widely feared that it has become something akin to TheScottishTrope.
* From Zoofights III, From Hell, monstrous creation of UsefulNotes/JackTheRipper. Created from a mish-mash of lions, dismembered human bodies and one seriously CreepyChild, From Hell quickly established itself as a HeroKiller and all-around nightmare factory.
* Burger Lord's [[NightmareFace face]] when his mask was removed.
* The second round of Zoofights VI brings us the horrifying Teddy Krueger. Imagine a massive kodiak bear with Freddy's iconic claws and a device that traps opponents in a waking nightmare. Also, he looks like [[http://zoofights.squarespace.com/storage/zoofights6/r2f1/TeddyKrueger.jpg this]]. Sleep tight. On second thought, best stay awake...
* '''''Monster Truck/Delorelion'''''. For heaven's sakes, he's a walking, talking...no, ''screaming'' engine of misery and rage. You see Teddy Krueger up there? Some spectators thought its nightmare cannon wouldn't help him much against Delorelion because every day of its life is another day in hell.
** [[http://zoofights.squarespace.com/storage/zoofights6/r2f1/11%20larger.jpg ''DeloreLion roars the roar of his ancestors; a roar that clears away a throat full of diesel and shakes windows for three blocks around. It turns out, the greatest nightmare of all is his own life.'']]
* [[EldritchAbomination Diet Croak]], anyone? [[http://zoofights.squarespace.com/storage/zoofights6/losers-league-royal-rumble/Diet%20Croak%20larger.jpg worms crawling in your belly eat them]]