Spoiler warning!
This article contains plot details about Pokémon Fusion Generation.

Bill's house, known as Sea Cottage is located on Route 25. It houses the Fusion Machine in Pokémon Fusion Generation and Pokémon Fusion Generation II. Early on in Fusion Generation, the house is stolen by Team Aqua and Team Magma and moved Atop Indigo Plateau. After they disband, the house is returned to Route 25 during the credits.