In the first few episodes, Pachirisu would often use Discharge and accidentally give Dawn a bad hair day. It was a Hyper Pokémon and Jessie admired Pachirisu and went up against Jessie and Ash's Aipom in a few episodes after. It helped Dawn with the appeals stage in the Floaroma contest and with Piplup in the Hearthome City contest. During the travels, Pachirisu got sick from storing too much electricity, but it quickly got better., after sending Team Rocket blasting off. When he had the first appearance of Ursula and her Gabite, Pachirisu learned Super Fang because Gabite stepped on a poffin. He battled Gabite in the contest and won a ribbon for Dawn which was a total of four. When the heroes taught the children about breeding, battling and contesting, Pachirisu and Buneary made a combination move, Ice Chandelier, from Ice Beam and Discharge, from Thomas' advice. He was used in the Grand Festival and with Mamoswine against Ursula's Gabite and Flareon. While they were at disadvantage, Dawn made a comeback, making Pachirisu and Mamoswine able to defeat both of Ursula's Pokémon via Ice Chandelier.