Iirc, the trainers in the Grand Hall are there from the beginning, and the ones that are there change daily. They also increase in level based on how far into the game you are. Hope this helps!
I've already done the sidequest, so just trade me anything you don't need. Ill be waiting online! Just send a trade request to 'GB' whenever you're ready
I could trade you one if you're fine with waiting like, 3 minutes
Also, how early into the game are you? Mine is pretty high level, so I want to level it down so it actually listens to you
Alright, I shaved a few steps off of the Beldum egg because I know that's gonna be a pain to hatch. Ill be waiting online! Just send a trade invite to 'GB' when you're ready!