From Bulbapedia, the community-driven Pokémon encyclopedia.
Oil Field Hideout (Japanese: かいていゆでんアジト Offshore Oil Field Hideout) is a location in Pokémon Ranger: Shadows of Almia. It is an undersea factory powered by oil, and is used by Team Dim Sun to build their nefarious Miniremo units. The player arrives here while chasing a kidnapped Wailmer and meets Sven who accompanies them through the hideout. There is a library where Isaac is usually found researching, and not far from there is the place from which Kincaid operates. An Electivire and a Porygon-Z can be found after completing the game. Gliscor is the boss and can not be captured anywhere else (Excluding the Capture Arena.)
Although Operation Brighton transformed the Shadow Crystal and its fragments, the Dark Shards in the hideout were not affected. As a result, remnants of Team Dim Sun joined back together under Kincaid and continued their villainy.