Laxton's Dugtrio was captured by
Goh. It was the leader of a group of Diglett on Laxton's farm and they were displaced into his field after Team Rocket affected their habitat and forced them to move. Dugtrio battled Team Rocket while it was
Goh's Pokémon and defeated them.
Goh left Dugtrio with
Laxton as he realized the Diglett would be in big trouble without their leader.