Trainer Frankie
Nostalgia.
Oh well that's helpful. Don't even think I have any yet and I despise bottle caps, but definitely good to know. ^^You can trade the coloured shards (red, blue, yellow, green) for bottle caps in the plaza castle
Not a special building needed right, just the center building where I go to sign up for like the global missions?
Also anyone know of a good wild pokemon battling spot for ev training speed evs? I swear Serebii had a list at one point (at least for past gen), but I can't find it. I mean I found a list of speed ev givers, but I think in the past I saw a guide that says like go to so-and-so cave and ev train for speed against zubats.