Kumquat Island (Japanese: リュウチン島Liucheng Island) is located in the northern region of the Orange Archipelago. It is a well known luxury seaside resort. Its main settlement includes many hotels, beautiful beaches, and natural hot springs.
The Gym on Kumquat Island is the main place of interest, and it is part of the luxurious Kumquat Hotel. The Hotel offers many amenities including a dance studio for Pokémon Trainers to get their Pokémon into shape and relaxing hot springs.
The resident Gym Leader and hotelier is Luana. Her Gym hosts Double Battles, but the battle ends when the first Pokémon faints, not both. If the challenger should defeat the Gym Leader, they will receive the Jade Star Badge.