If I'm correct the level cap now is 70 and Ame is staunch on not letting most pokemon on the OU tier in the game yet but I think we are deep enough in the game that certain Pokemon with ridiculous level conditions should be allowed. See Deino. But as for pokemon we might actually get
Any Ice-Type Pokemon (not in the game) is a possibility if Team Meteor does something involving ice with their machines. The only reason I make this claim is because we have done Fire, Grass, and Psychic machines.
Gurdurr, Mienfoo, since we are in a mountain, every pokemon game has fighting pokemon in mountains.
Slowpoke for lolz.
Golurk or Pawniard again Team Meteor theory
Ruffet because Level 54 as an event to boot
Druddigon because I think this would troll everyone asking for a dragon in the mountains.
Finally if Ame is merciful she would put Axew as an event but I think that would be next episode or two episodes down.
I hope I am 40% right