Lunpa Fortress

Lunpa Fortress is an optional dungeon accessible from within Lunpa in Golden Sun. It is where Dodonpa and his empire of thieves and bandits stake their claim and rule over the town with an iron fist, while his father Donpa has no say in the matter. Late in the game, when Isaac's party has attained the Cloak Ball in Tolbi at Gondowan, this dungeon is available and can be entered.

Using Cloak to stay out of the sight of patrolling guards in stealth gameplay is the emphasis of the dungeon. At the end, in the cavernous bottom, the party fights an optional boss named Toadonpa. Afterwards, the town's weapon and armor shops will open up and their powerful artifacts will be available.