Yes, actually. My friend Riku got all sixteen a while ago, but even he couldn't face the Elite Four yet. I kind of wonder if maybe they are waiting for more people to get all sixteen. Maybe things will work differently here than they did in the games. I haven't met any of them though, no. I don't think anyone has. I am not even sure who the champion is, to be honest. In the game, it was your rival but somehow I don't think that's how it will work here, especially since the whole point of the game was to beat him.

[Oh wait hold the phone. What if...]

Though I guess the champion could always be the main character from the game.