From Bulbapedia, the community-driven Pokémon encyclopedia.
Alex Davis (Japanese: ノボル Noboru) is a Pokémon Trainer who appeared in Power Play!.
Announcing himself as "Alex Davis from Cherrygrove City" at the beginning of the episode, he challenges Gary Oak to a Pokémon battle using his Alakazam. However, Gary is able to defeat Alex without much trouble. Ash, Misty, and Brock, who have been traveling nearby, see the battle, leading to another encounter between Ash and his rival.
In the English dub, Alex is given a Cockney accent.