Unico

Unico's way of bringing happiness to others gets him into trouble with the gods, who believe that only they should have the ability to control others' emotions. The gods send the West Wind to banish Unico to the Hill of Oblivion, but the West Wind takes pity on Unico and declines to follow the gods' commands. The gods are furious when they learn of the West Wind's defiance, and send the Night Wind to capture Unico. To protect Unico from the gods and the Night Wind, the West Wind must continually transport the little unicorn from place to place. Whenever the gods discover Unico's whereabouts, the West Wind appears to spirit him away once again, often without getting to say goodbye to any of the friends he has made - and without any memory of those friends, as Unico's memory is wiped clean each time.
In the 1979 film, Unico was a pet to Psyche, the most beautiful girl in the mortal world and he brought her eternal happiness. But the goddess Venus was jealous and angry at Psyche for being more beautiful than her and kidnaps Unico to make the girl unhappy. Venus orders the West Wind to take Unico away where he would be cursed to wander alone and forget everything he remembers.