Harrison used Houndoom to battle a Machamp and a Machoke, who stood guarding the shrine's sacred flame for the Johto League. Misty's Corsola fired Spike Cannon, along with Houndoom's Flamethrower, to hit the two Pokémon. While Corsola's Tackle and Houndoom's Flamethrower defeated the two Pokémon, Ash was bashed away by Sneasel, to which the group retreated away. Later, Harrison and Ash arrived, using Houndoom and Phanpy. The two used Headbutt and Take Down to strike Machoke and Machamp. The latter two went to retaliate, but tripped over Phanpy and rolled down a slope, bashing into a tree.
Harrison sent Houndoom to battle Ash during the battle at the Johto League. Harrison's Houndoom quickly evaded Snorlax's Hyper Beam and defeated it. Ash then sent Bayleef to use Razor Leaf, but Houndoom's Flamethrower easily countered it. Houndoom then evaded Bayleef's Headbutt, however this was a distraction to have Bayleef use Vine Whip to shut Houndoom's mouth. Bayleef tossed Houndoom away and defeated it with Body Slam. Houndoom battled in the semi-finals, but was defeated by the opponent's Rhyhorn.
|Flamethrower||fire||GS149: Pop Goes the Sneasel|
|Headbutt||normal||GS149: Pop Goes the Sneasel|
|Counter||fighting||GS155: Playing with Fire!|
|Bite||dark||GS155: Playing with Fire!|
- Kōichi Sakaguchi (Japanese and English)