Hybrid AU

Hybrid AU (also known as Animal AU and Animalized AU) is an AU in the fandom where the Big Four are hybrids, portrayed as animals and have animal like abilities or parts.

About the AU
Spawning from fanart, this AU places the Big Four, and other such characters as Hybrids and have human characters animalized (or portrayed as animals, its a bit like genderbending) and animal and 'creature' characters humanized (portrayed as humans) for Pairings and other AUs. The four also have animal like parts (like ears and tails) on their bodies or their abilities or partnered up with animals (that aren't characters in the fandom or any other film).

Popular Spinoff AUs

 * Deertaur AU
 * Centaur AU
 * The Little Mermaid AU
 * Angel AU
 * Maximum Ride AU
 * Mortal Instruments AU
 * Monster AU
 * Zootopia AU
 * Gargoyles AU

Animal AUs

 * Lions
 * Horses
 * Dinosaurs
 * Patronuses
 * Bending AU

Hiccup Horrendous Haddock III
Fans have infused Hiccup with Toothless as they turned him into a Night Fury Hybrid. They have also made him a human with dragon like abilities (because of his dragon like soul), like understanding what they are saying, breath fire and having dragon like eyes or turned him into a Night Fury.

In some modern crossovers he is Toothless' owner, when his dragon is cast as a house pet (like a black cat or three legged dog) or a black, strong steed he rides from time to time.

Jack Frost
The animals Jack has been turn into by fans is a Polar Bear for the Jarida pairing (when Merida repeats her story with him as she gives him the spell that turned her mother into a bear) and a White Ferret for Hijack. He is also portrayed as a Wolf (by placing the ears and tail on his human body) for the Red Riding Hood AU and a Cat (the Cheshire Cat) in Wonderland AU (and Chat Noir in Miraculous Ladybug AU), while his Patronus (in Hogwarts AU) takes the form of a Fox or hummingbird. Jack is also seen partnered up or being good friends with Arctic and Winter animals or with a wolf.

Merida DunBroch
Fans have given Merida the form of a cat or raccoon for Jarida. She can also be portrayed as a bear, because of the spell she used on her mother, for Beauty and the Beast AU and the form of her Patronus in Hogwarts AU.

Rapunzel Corona
Rapunzel can be portrayed as either a horse (because of her relationship with Maximus) or infused a her with a horse, to make her a centaur (seen in Centaur AU) or portrayed as a chameleon (due to her relationship with Pascal) or have chameleon like abilities.

Toothless
Toothless is portrayed as a Human or a Night Fury/human Hybrid for the Toothcup, Stormless, Toothjumper and Buckteeth pairings or a Cat or Dog for the Modern AU and corssovers and a Horse for Ranch AU.

Dragon Riders
The Dragon Riders are dragon Hybrids as fans infused them with their dragons. While their dragons are portrayed as Humans or other Animals, like cats, dogs or birds.

Stormfly
Stormfly is portrayed as Astrid's pet Bird or Dog for modern crossovers and a Human or Deadly Nadder/human Hybrid for the Ermfly and Stormless pairings.

Guardians of Childhood
Toothiana, E. Aster Bunnymund and Sanderson Mansnoozie are portrayed as humans (humanized) or (normal) animals for Pairings and other AUs and crossovers.

Tadashi Hamada
Tadashi is sometimes portrayed as a Fox, because of the "Kitsune" identity he takes most commonly in Dark AU. Fans have also turned him into Dog takes care of his little brother, when Hiro is portrayed as a puppy or kitten.