Tretasman

Missing the NPC - AshWestBrook boss at Spear Pillar i'm pretty sure the boss is in the same location as an important sinnoh story quest, so finishing the sinnoh story after the boss was ingame causes it to not appear at all. i'm Sinnoh Champ with 550hrs played, as well as 50 sinnoh hours so requirements are met to challenge the boss, its just missing. What is the quest that kills palkia and dialga?

WTB good tyranitar for pvp Nature: Adamant Ability: Sand Stream

WTS S.seviper s.o = 600k c.o = insta = 1.2m