Tanoby Ruins

Tanoby Ruins, Kanto and the Sevii Islands (from Pokemon FireRed).

How to get here. Needs the Rainbow Pass, which comes from the Celio quest: finish the Tri-Pass islands, get the National Pokedex (it opens when you beat any Champion), bring Celio the Ruby from the Ruby Path cave in Mt. Ember, and he swaps your Tri-Pass for the Rainbow Pass. The Seagallop then sails to every Sevii island. The seven chambers open one by one once you solve the boulder and switch puzzle in the Tanoby Key room in Sevault Canyon.

Levels are this area's own. In your first region they stay as shown; in a region you open later they are raised to match your progress, unless you started that region fresh. See levels.