Hey Bill I just wanted to ask what a champion in any region has power over? Can they make rules or change things? I ask because I ran into Alder on a trip to Unova and he said being the champion entitled him to the Casteliacone I bought since he dropped his.

Few people outside of Unova have kind words to say about Alder, and frankly

On a serious note, the actual powers a champion has are more limited than you’d think. While, like gym leaders, they’re heavily encouraged to help protect their domains whenever possible (it’s just that a champion’s domain is an entire region, rather than simply a town or city) as well as make certain public appearances, they’re more or less high-ranking sports stars. The most decision-making power they have is within their respective Leagues, and even then, every proposal they have needs to be put before their branch of the Pokémon Association before it can be passed. (After all, we have ten-year-old champions; we don’t want to give them the power to make massive, permanent decisions.) Likewise, while they could assist in sting operations against the major crime organizations that seem to be cropping up lately, they don’t actually have the power to arrest anyone. Law enforcement only call on them for firepower, and that’s about it.

Or in other words, Alder owes you a casteliacone, and although I know he’s stepped down from his role as champion years ago anyway, I’m going to be sending word to my counterparts in the Unovan Association.