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. In Another Gabites the Dust!, it had the first appearance of Ursula and her Gabite. It learned Super Fang because Gabite stepped on a poffin. It battled Gabite in the contest and won a ribbon for Dawn which was a total of four. In Doc Brock!, Pachirisu got sick from storing too much electricity, but it quickly got better. In DP167 a combination was processed by Pachirisu and Buneary. It will use it in the grand festival and this time it is going to be with Mamoswine. In Double-Time Battle Training, Pachirisu appears to have a fear of ice when practicing a double performance with Mamoswine.
In Strategy Begins at Home! at Pachirisu is male along with Piplup in Double Battle against Johanna's Glameow and Umbreon when they use Attract