Arcanine's next appearance was in Extreme Pokémon!, where he used it to compete in the Extreme Pokémon Race. Ash initially thought Gary was mistreating the Pokémon, but after learning that it wasn't hurt, he competed as well. Ash decided to compete with his Bayleef, which proved to be a good choice. During the competition, Team Rocket tried to catch Arcanine. They failed however, thanks to Ash's intervention and after defeating the trio with the help of Gary, both decided to continue the competition where Ash ultimately defeated Gary with great effort in his first victory over his great rival.
After he decided to become a Pokémon Researcher, Gary left Arcanine along with most of his other Pokémon with his grandfather.
Personality and characteristics
Arcanine is one of the strongest Pokémon in Gary's team. In its first appearance, it was strong enough to beat an opponent with a type advantage in only three blows. Arcanine was fast enough to put Gary in a comfortable position in the Extreme Pokémon Race even with the many unforeseen events that occurred during the race's duration. Gary appears to have enough confidence in Arcanine that he even kissed his Poké Ball before sending it into battle. In addition, in the Japanese version of its debut episode, Gary refers to Arcanine as being "My honey" (ぼくのハニー), strongly suggesting that it was one of his favorite Pokémon.
He is first shown in Ash vs. Gary where Gary uses it to try to capture a giantSlowpoke. When the Slowpoke was taken away by some mysteriouspeople, he sends it out to search for the people responsible for stealing the Slowpoke. It was able to find them at the same time Ash did. It was stopped by Team Rocket's transforming machines when Meowth sprayed water. Despite his efforts Arcanine has had little success in battle. Arcanine continued the search for Team Rocket afterwards. Unlike the last time, Arcanine was able to get to Team Rocket before Ash arrived. Pikachu was able to find the giant Slowpoke and they find out that this Slowpoke can hypnotize people. Gary has Arcanine battle it to prevent it from hypnotizing people but it had very little success in doing so as Arcanine was stopped by a Disable and was frozen by Ice Beam. Afterwards, it becomes hypnotized along with Gary's other Pokémon.
In the opening The Rivals and its English equivalent Pokémon World, Gary is shown with a Growlithe. Gary's counterpart in Pokémon Puzzle League also appears to use the same Pokémon which evolves in the progress of the game, but it's unknown if it is the same case in the anime.