Xiaoqiao is a very convenient excuse for this kind of thing. She's on her way out of Cherrygrove but they can always run into each other before she goes. She doesn't have a set traveling partner/timeline though so it's flexible. If she knows him she can always just call and be like YOU'RE GOING, RIGHT? YOU'RE YOUNG, YOU SHOULD HAVE FUNNNNN!!

...Joonhee will blank look him. All the weird things in pokeworld and these things make him blank out. (btw are we going with korean ages or chronical ages?) I'd love to have them bond over...korean-ness because Joonhee is secretly so homesick. And just yeah, Joonhee + weirdly touchy dude friends. It's a thing.