The Tarsier is a one-time character and the hidden antagonist in the episode "Congo on Like This", from Disney's animated series, The Lion King's Timon & Pumbaa.
As a tarsier, he seems to be rather pessimistic as he tells Timon and Pumbaa that Simba might be the predator who ate the dead animal, leaving its skeleton lying on the ground. With the tarsier costume off, the wild dog seems to be evil, mean-spirited, cruel, and carnivorous.
He has the typical appearance of a tarsier: He is short with grayish-brown fur with a cream light-brown chest and bushy end of his tail. He also has purple eyes, a red nose, peach ears and mouth, and buck teeth.
The tarsier later reveals himself to be a large gray wild dog, perhaps a wolf or a cape dog, with yellow eyes and a blue nose.
Timon & Pumbaa
The tarsier first appears when Timon and Pumbaa come across a skeleton, claiming that there is a predator on the loose. He tells them that he believes Simba is the predator.
He later appears after Timon believes that Simba is definitely the predator and tells him and Pumbaa to come with him to a safe place. This "safe place" is a cave filled with other skeletons where the tarsier reveals himself to be in fact a wild dog and that he has been trying to get Timon and Pumbaa away from Simba for months. He prepares to eat them, but just then, Simba arrives to save them. The wild dog quickly puts back on his tarsier disguise and is picked up and spit by Simba, who throws him far away.