Gamers. They're chubby, geeking looking dudes with glasses and beards holding a 3DS in one hand and a pokeball in the other, wearing a Gamefreak logo shirt. They would use the porygon line, bug types(since many gamers like exploiting glitches) and electric types(to keep their 3DS charged). Or you can go meta and have them use smogon-esque movesets on their pokemon.