After finishing the Original Dragon, Holon, and Dream World quests, go back to Perfection Base (in the Black Market).NOTE: Remember where that shack is, as you will want to go back there eventually in Quest 10: Diana’s Parcel. After you win, enter the shack to catch Darkrai.As you climb through the Badlands, battling as you go, eventually you will arrive at a small shack, before which a rather powerful trainer will accost and battle you.After the conversation with Adam finishes, the player is warped to the Prion Site and is told to go west into the Nightmare Badlands.Once the player has obtained the ability to use Waterfall and Rock Climb to return to the Dream Realm, the player is immediately thrown into a conversation with Adam in his Gym shortly after reentering Erebus City.After obtaining the Hiking Boots (Rock Climb) and the Magic Carpet (Waterfall), go to the middle cave entrance in Route 5.At the end, battle the level 80 legendary Meloetta and obtain the Relic Song ability.Follow the paths and continue exploring the cave, releasing locks using the Mysterious Scrolls in the process.
Head to Metchi and proceed to the left side of the Daycare Center where the scientist will be waiting for you.Talk to the scientist near the bottom left pond in Gaea Town where he tells you to meet him in Metchi Town.Head to Gaea town to continue the quest.Obtain the Delta Noibat egg (optional) and leave the tower.Although reading the notes found along the way provides a nice story, only the note nearest to the egg at the top is required to continue the quest.Head to the Ancient Tower found in Selene City and proceed to the top (this requires the Bike obtained in Roggan Town).After finishing the battle with it, you will be sent back to Gaea Town. Tip: Hitting it with physical attacks will have a chance to instantly faint your Pokemon. You will find a buggy mess in the ocean, which says it's “Gaea Town”. When you reopen the game, hop onto the EmolgaTaxi and soar to the southeast of Torren.Find the Human Calculator in Gaea Town, tell him to divide by 0 and watch your game crash.Once enough Cells and Cores have been collected, head to Terminus Cave in the Void Gauntlet to change Zygarde's form.After Taen leaves, Gail will wait for you near the stairs, presenting you with the Zygarde Cube.Then Taen leaves the region to star in Pokemon Azurite, marking the end of Taen's Quest.You can catch it and then collect the stones for Zekrom and Reshiram. After your fight with Taen, Zygarde will start rampaging.
Listen to their conversation and then return to Dragon Ruins. From here, go to the far west wing in Utira Library to find Orion.At the end of the temple you will encounter Taen beat him and heal at any Pokemon Center. You will be transported to No Man's Land. From here, go to Gaea Town and use the Hyperspace Hole inside the old gym.She shows you her Zygarde in a friendly spar and gives you a pair of Hiking Boots, the replacement for HM Rock Climb. Head to the Perfection Base where you find Reukra being berated by angry protesters including one green haired individual named Gail.He tells you that Taen is back in town and is gonna try to summon the Original Dragon once again. After getting a call from Orion, you head to his gym where he briefs you on his situation.Events at the Gaea Core mark the end of the Holon Quest plot line.While going through the Holon Lake the second time, you'll be given a Master Ball.While going through the Holon Pyramid, you’ll find the Magic Carpet, the replacement for HM Waterfall.The subway will take you to the Holon Region where you can obtain several Delta Pokemon, including the Delta Regi Trio.They ask you you to go to Suntouched City’s Subway. After beating the Timeless you will get a call from Scientists Club if you already finished the mission.Defeat all of them and battle their leader to become the Third Augur of the Torren Region and unlock other postgame quests.After you beat the E4, go back to the Crystal Caves south of Amphitrite City where you battled Mew, where the Timeless are waiting.