From Bulbapedia, the community-driven Pokémon encyclopedia.
Jun (Japanese: ジュン) is a character in in Pokémon Diamond and Pearl Adventure. He is based on Pearl, and is Hareta's rival. Jun has a crush on Mitsumi. He is a very strong trainer, with some strong Pokémon at his disposal. He is quick thinking and has some respect for Hareta, which is shown after he saved the Valley Windworks and defeated Mars. He can be arrogant and cocky at times, believing that he would win the contest, but he and Hareta were disqualifie by Dexter.