In the leaked source code for Mario 64 there was a model found for the unused enemy Motos. Very likely an extremely early version of the Bully enemy, as the early Big Bully model (with one horn as seen in pre-release material dating to '95) is named Otos and the mission Bully the Bullies is called BigMotos in the game's code. There is also text in the source code relating to an ice variant called Ice Motos. (The original boss of Snowman's Land instead of the Chill Bully according to The Cutting Room Floor.) Whose model was deleted as no model of this variant was found. I decided to make what this variant could've looked like taking in account of it possibly being an early Bully and reusing the Chill Bullys' textures for Ice Motos' body.
Credit to The Texture Resources and Nintendo for all.