Harrison's Sneasel first appeared in Pop Goes The Sneasel. It was a wild Pokémon who, with a Machop and Machoke was blocking people from accessing Ho-Oh's flame. It first appeared when it threatened Team Rocket, savaging Arbok with Fury Swipes and defeating Meowth in a single hit. It then ordered its cronies to send Team Rocket blasting off. It later attacked Ash as he reached the temple, and savagely fought his Totodile, interrupting its dance with a pair of Slash attacks. It dodged Water Gun and used Feint Attack and Shadow Ball to knock it out.
Sneasel and Harrison
Team Rocket made a failed attempt to capture Sneasel, but Meowth's bitterness at being replaced caused the plan to fall apart and they defeated themselves. Harrison then ordered Blaziken into battle. Sneasel proved no match for Blaziken's sheer power and type advantage, being knocked out with a Fire Punch to the face. Harrison threw a Poké Ball and captured Sneasel.
Despite being new to his team, Harrison trusted its strength enough to use it in the Silver Conference, where it faced a Machamp and defeated it, despite the significant type disadvantage.
Sneasel losing to Totodile
In Playing with Fire!, it fought against Ash's Pikachu as Harrison's second Pokémon. It easily used its speed to dodge Thunderbolt and took Pikachu out with Metal Claw. It then fought a rematch with Totodile, who learned from Pikachu's mistake and instead bit down on Metal Claw. It then danced around while thrashing Sneasel against the ground. A powerful blow from Totodile's tail eliminated Sneasel, causing Totodile to dance in celebration.
Personality and characteristics
Sneasel first appeared to be a very mischievous, stubborn and a strong Pokémon, as it prevented people from accessing Ho-Oh's flame, despite the fact that the entire Silver Conference would stand still without the flame. Nevertheless, it lost its attitude upon capture and turned out to be a very reliable and trustworthy Pokémon, to the effect that Harrison chose it to battle Ash in the Silver Conference.