Hariyama first appeared in Brave the Wave as a Makuhita. Like Brawly and Machop, Makuhita also enjoys surfing the waves and uses the surfing techniques it learned from Brawly in its battles. It was used against Ash's Treecko in a Gymbattle. With its impressive power and skill, Makuhita was easily able to gain the upper hand. However, when Treecko kept coming back for more, Makuhita evolved into Hariyama. With the massive power boost it gained by evolving, Hariyama finished Treecko off easily with Knock Off, thus defeating Ash. However due to its greater size and weight, Hariyama found surfing more difficult.
Hariyama appeared again in A Meditite Fight where it helped Ash and the others to escape from a violent storm.
Ash had his rematch against Brawly in Just One of the Geysers. Hariyama was able to defeat Corphish and battled Treeko a second time. But thanks to Ash's strategy, Treecko was able to defeat Hariyama after a fierce battle, earning Ash the Knuckle Badge.