Dark Crater
There are b15f + Deepest Part b15f + Bottom. Unlock by Clearing Sky Fissure to discover Darkrai`s disguise Boss-Darkrai,Arbok,Magcargo,Aggron,Mismagius,Rhyperior,Magmortar,(Only First visit)Mewtwo and Entei Require a Enigma Part or Secret Stoneplate.