Enraged Elk

The Malicious Reindeer is an Emblem Heartless introduced in Kingdom Hearts χ, it is a boss in Beast's Castle.

Kingdom Hearts χ[chi]
The Malicious Reindeer is summoned when Gaston's darkness grows stronger, and attacks the player, Belle, and Maurice. The player instructs Belle and Maurice to go on ahead while they stay back to take care of the Heartless. After the enemy is defeated, Chirithy appears and tells the player that the deeper the darkness in one's heart, the stronger the Heartless that are created.

Design
The Malicious Reindeer is a Heartless looks like Gaston with the hair style and the clothes wear, holds a makeshift club which is from one of the statue in Beast's castle as Gaston used it to attack Beast in the film.