Team Galactic Eterna Building

The Team Galactic Eterna Building is a dungeon in Sinnoh. It initially has 64 tiles arranged in an 8x8 square, including 8 chest tiles, 19 non-boss encounter tiles, and 1 boss encounter tile.

Boss Encounters
*Must have cleared Team Galactic Eterna Building at least once and caught Rotom from Old Chateau to unlock Rotom forms