Warthogs were intelligent, graceful creatures in the world of Narnia.
During The Magician's Nephew, Warthogs were summoned by Aslan's call after Narnia's creation. One Warthog was part of the council that chased Andrew Ketterley, and ended up keeping him as a pet. One Warthog, along with some other animals, first thought that Andrew was a tree.
Warthogs were later seen in the coronation where Frank I and his wife Helen became the first King and Queen of Narnia.