Extroyer's Transformations are the many forms that Extroyer is capable of transforming into, generally being animals. Most of Extroyer's transformations are based off on animals, even though that he is capable even of transforming into Max Steel's Turbo Modes, other Ultralinks and mythical creatures or some creature, beast that doesn't exist. The transformations can have the exact same characteristics of the actual animal that Extroyer extracted, such as the size.
When Extroyer morphs into an animal, or as Steel refers it as "Extroys", the animal becomes a part of him and his Ultralink start to glows purple until he fully transforms into the animal.
Ever since Troy Winter infused with the damaged Ultralink that he stole from N-Tek, he got the ability of transforming into any kind of animal existing on Earth.