Togedemaru first appeared in Alola to New Adventure! alongside her Trainer, welcoming Ash to the school. Togedemaru later watched as Team Skull Grunts battled Ash and Kiawe.
In The Guardian's Challenge!, Togedemaru helped Sophocles run his computer program, powering it by running on a wheel. She was later used to help welcome Ash to the school, competing in Sophocles's challenge against Ash and Pikachu to pop balloons the fastest. Sophocles and Togedemaru quickly took the lead, using Togedemaru's spikes to efficiently break the balloons. After Ash attempted to use Pikachu's Thunderbolt to turn the tides, Togedemaru used her Lightning Rod Ability to absorb the attack and quickly pop the remaining balloons with Zing Zap. She later watched Ash and Pikachu's battle against the guardian deity Tapu Koko, after which Sophocles informed Ash that he and Togedemaru could help him with anything related to Electric-type Z-Moves.
In SM006, Togedemaru got separated from Sophocles due to a power outage at the shopping mall caused by Team Rocket. She, Pikachu, and Rotom eventually made their way to the mall's roof, where they came across Team Rocket. During a showdown with the trio, Pikachu got blasted off the roof by Mimikyu's Shadow Ball, but was able to hang on to an opposite building. When Sophocles and Ash arrived, Togedemaru used her Lighting Rod Ability with Pikachu's Thunderbolt to turn the tide of battle with Zing Zap.
Togedemaru has a strong relationship with her Trainer, often seen attached to Sophocles's side. Sophocles even goes to sleep with her by his side, using her glowing cheeks as a nightlight to help with his fear of the dark. Togedemaru loves to be helpful, as seen when she seems very pleased to help Sophocles run his programs, and is very proud to have helped him win a balloon popping challenge. She seems to be very fond of Ash's Pikachu, even going so far as to jump on Pikachu in order to show her affection towards him. It is unknown if, due to Togedemaru being a girl, she has a crush on Pikachu.