>>49392782Maybe the invading king, uses the original dragon? But it's eventually split. Kyurem escapes to space. Zekrom and Reshiram get locked away.
Also, I think the over seer of Colonial Unova who eventually helps you take down Galars king should be Ghetsis ancestor. Ancestor Ghetsis hates seeing Pokemon being abused and subjugated by humans, but modern Ghetsis takes this ideology to the extreme.