During a Gym Battle against Giovanni, Gary Oak choose Arcanine as his second Pokémon after he was forced to switch out his Nidoking against Giovanni's Kingler.
Gary Oak quickly told Arcanine to charge at Kingler and then use a flamethrower attack. Even though Arcanine was at a type disadvantage, it defeated Kingler using a Fire Blast attack.
Giovanni's next choice in Pokémon was Mewtwo who quickly defeated Arcanine using Psychic.