Chris explained that he had last left Cubchoo in the Pokémon House when it went to sleep for the night. When he arrived the next morning, Cubchoo was gone. During their search, the group came across a wild Beartic, which Cilan assumed kidnapped his Cubchoo. That story soon changed to Beartic actually evolving from Cubchoo. When Chris attempted to return it to its Poké Ball, it failed to work, though, indicating it was just a wild Beartic.
The group soon spotted Chris's missing Cubchoo playing with a wild Larvitar. It had helped Cubchoo escape the Pokémon House by opening the door and digging a hole under the fence. Chris realized how close Cubchoo and Larvitar were, so he decided to add Larvitar as a member of his team.
Chris's Cubchoo had disappeared from the Pokémon House late at night in order to play with a wild Larvitar. It was eventually found with Larvitar which had become Cubchoo's sparring partner.
This Larvitar had befriended Chris's Cubchoo and had a hand in its escape from the Pokémon House. Before Cubchoo went back to Chris, it had a battle with Ash's Scraggy which ended in a draw. Chris then let it join his team so it could be with Cubchoo.