From Bulbapedia, the community-driven Pokémon encyclopedia.
Harrison (Japanese: ハヅキ Hazuki) is a character from the Pokémon anime. He began his journey in Littleroot Town, Hoenn, and competed in the Silver Conference. His English voice actor is Wayne Grayson.
He first appeared in Pop Goes the Sneasel. Along with Ash and his friends, Harrison tried to ward off a wild Sneasel that was guarding the sacred Ho-Oh flame. Harrison promised that he would capture it. Using his Houndoom, he did just that.
After many cameos during the qualifying rounds of the Silver Conference, Harrison appeared next in Can't Beat the Heat, where he and Ash began their six-on-six battle. It continued in Playing with Fire and Johto Photo Finish. In the latter episode, Harrison defeated Ash, but went on to lose to Jon Dickson.
It was Harrison who convinced Ash to go to the Hoenn region. He told Ash all about Professor Birch and about all the Pokémon that Ash had probably never seen before.
Harrison has these Pokémon in his team:
Harrison has similarties to Ash's Hoenn League rivals, Morrison and Tyson. They are connected by the "-son" ending at the end of their name and they have a Blaziken, Swampert, and Sceptile, the final evolved forms of the Hoenn starters. Tyson has Sceptile, Harrison has Blaziken and Morrison has Swampert, respectively.
Harrison also has name similarities with another of Ash's Silver Conference opponents, Jackson. Along with the aforementioned "-son" ending, they are both named after famous singers. (George Harrison and Michael Jackson respectively.)