Yeti

The Yeti (a.k.a. the Abominable Snowman) is a monster who worked at Monsters, Inc. until he got banished (for an unknown reason) to the Himalayas. Despite being banished, he likes living in the human world.

Monsters, Inc.
In the first film, when Mike and Sulley get banished to the wasteland in the Himalayas, the Yeti greets them and makes them feel comfortable in his cave.

Monsters, Inc. 2
In the second film, he will reappear.

Trivia

 * He appears again in Cars as a snowplow when Mack is in the movie theater during the end credits.