I understand that, but I don't see how they look like digimon at all - since there's not a clear cut on how one can describe a pokemon and a digimon. In my opinion, they're pretty unique; I can't wait to see more.
Anyway, yeah, Tate and Liza were pretty tough to beat back in the day, so I'd love to see more tag team gyms like that. Maybe an option for the game to make everything purely double battles? Unlikely as that seem, it'd be a nice concept.
As for royalty, I can see that royalty can be incorporated with the gym leaders and the elite four. Like say, the King's royal court could make up the gym leaders, and maybe the official family of the King could be the Elite Four... as for the King himself, I'm not sure if he'd be the champion, but the guy who's hosting the actual pokemon league, like in medieval times where the king usually hosts knight joust tournaments. Maybe the Champion can be the official "black knight"!