Uxie is a Legendary Pokémon introduced in Generation IV (Sinnoh).
It is not known to evolve from or into any other Pokémon.
Discoverer's Dex Entry
One of the three Legendary lake guardians, Uxie is known as the Being of Knowledge. It is said that Uxie can wipe out the memory of those who see its eyes and that its emergence gave humans the intelligence to improve their quality of life.