Damian is a one-time character that appeared in Charmander - The Stray Pokémon. Though he looks like a stylish guy, he's actually very cruel. He bragged about how he abandoned a Charmander in the middle of nowhere. He doesn't care about Pokémon, but he has quite the collection. He was voiced by the late Maddie Blaustein. When Ash got Charmander to defeat Team Rocket Damian asked Charmander to join him but Charmander went to go with Ash instead.
His only known Pokémon was Charmander. When he challenges Ash to a fight for calling him out, he only brings out a Poké Ball. It is unknown how many Pokémon he owns but it can be implied that it is a large number since he had a huge pile of Poké Balls on a table in the Pokemon Center where he bragged about them to a group of boys, assumed to be his friends.
Damian owned a Chamander, but after he realized it was weaker than his standards, he left it on a rock and left it behind.