From Bulbapedia, the community-driven Pokémon encyclopedia.
The Antimony Research Lab (Japanese: アンチモニー研究所 Antimony Research Institute) is an anime-exclusive location in the Unova region.
It appeared in A Home for Dwebble! as a facility where research on the Meteonite was being carried out. Pierce assigned Jessie, James, and Meowth to investigate it and steal all of its data on the Meteonite. Later in the episode, the trio infiltrated the lab by skillfully evading its security. Using a remote-controlled device, James successfully downloaded all of the data on the lab's servers, which they later handed over to Pierce.