>>50916032Ryuki was meant to be a gym leader for Alola before they decided to scrap the gyms for the Gen 7 games; but iirc the team loved him and his design so much that they tried to put him in anyways and ultimately managed to squeeze him into S/M as an E4 challenger just so they could have an excuse to have him around.
Frankly, I don't mind. He's fuckin' awesome and his animations are really fun. But he's a rockstar who specializes in dragons and explicitly hails from a foreign land. The fact that they didn't tie him into Galar feels like a missed opportunity. He would've been a much more interesting (or at least enjoyable) Dragon Gym Leader than the phone-absorbed drooling retard with the toiler-inhaler.
Unfortunately I highly doubt we'll ever see him again; he wouldn't fit in S/V at all and despite how completely out-of-place he is/looks in Alola is looks like they're committed to the fake gym experience bit.