It's stated by Horacio that this special Charjabug was captured by their father for the upcoming Charjabug Race. Charjabug was used in the race, where it became tired from the laps. It was unable to secure first place, instead of obtaining the runner-up position due to Horacio's arrogance getting the best of him.
Weeks later, the Shiny Charjabug and its teammate Team Red Comet visit Poni Island’s Vast Canyon to find a Bug stone, which they believe it will evolve it into a Vikavolt. It and its trainer Horacio race their rivals Sophocles and his Charjabug for that stone through entering the Gobat cave. As Shiny Charjabug and Horacio are foolishly running across a bridge with weaker ropes, despite Sophocles’ warning, they are rescued by Sophocles’ Charjabug, who are recently evolved into a Vikavolt without a stone from falling. Due to Horacio’s deluded believes that the Bug stone can still evolve his Charjabug into a Vikavolt and begin to witness the stone is not working at all, Sophocles lectures him to evolve Charjabug into a Vikavolt is not about the stone, it was a hard work to improve its magnetic powers of the land that allow this evolution. Afterward, Horacio begins to restart over to evolve Charjabug thanks to Sophocles' tips.
Sometimes prior to the Vikavolt Race announced, Horacio’s Charjabug has finally evolved into a Vikavolt off-screen, thanks to Sophocles’ tips. In the middle of the race, Vikavolt and Horacio aids Sophocles and his Vikavolt rescuing the other Vikavolt racers from Team Rocket's ambushes, right before Bewear and Stufful drags Team Rocket away from sabotaging the race. Despite being the runner-up, their rivalries with Sophocles and his Vikavolt warms-up and becoming much friendlier.