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. When Ash got Charmander to defeat Team Rocket Damian asked Charmander to rejoin him but Charmander chose to go with Ash instead, but not before it sent Damian running with Pikachu's help.
Pokémon the Series: Black and White
He makes a small cameo appearance in one of Ash's flashbacks explaining to Cilan, Iris, and N about his Charizard.