Harrison
Japanese name: ハヅキ (Hazuki)
Voice actors: Katsumi Toriumi (Japanese), Enzo Fortuny (Latin American Spanish), Wayne Grayson (English)
Harrison hails from Littleroot Town in Hoenn and made his mark by competing in the Silver Conference. He's best known for his pivotal match against Ash—and for being the one who actually pushed Ash to explore the Hoenn region in the first place.
His debut came in "Pop Goes the Sneasel," where he helped Ash and friends deal with a wild Sneasel protecting Ho-Oh's sacred flame. Harrison caught the Pokémon using his Houndoom, cementing his reputation as a capable trainer.
After showing up throughout the Silver Conference qualifiers, Harrison faced off against Ash in a six-on-six battle that played out across three episodes: "Can't Beat the Heat," "Playing with Fire," and "Johto Photo Finish." He won that match—a rare loss for Ash at the conference—but ultimately fell to Jon Dickson later in the tournament.
Beyond the battles, Harrison played an important role in Ash's journey. He's the one who told Ash about Professor Birch and hyped up all the new Pokémon waiting to be discovered in Hoenn, essentially convincing Ash that his next big adventure lay in that region.
Content compiled by AnimeList.moe from publicly available sources.