>>28214079Actually, I'd say Xerneas and Yveltal have MORE behind them. There's AZ, the Zygarde Catastrophy currently happening in the anime, and the fact that the main plot of X&Y revolves around Xerneas and Yveltal (depending on version).
I don't recall Ho-Oh having nearly that much.
>>28214091It's not so much "Jurisdiction" so much as being embodiments. Think sort of like the bird trios who embody basic elements but can call on those elements to influence the world around them (ex: zapdos calls a storm forth).
I don't have any info on why they are, but I like to think that Arceus tried something new and it didn't work as planned so he made Zygarde to put a stop to what would have been sheer madness.
