I wonder where that puzzle is going to be located, I'm legit more hype about the Puzzle and the reward(Scyther? Popilo? Some other newly released pokemon?), then the episode being released.
I could see Poipole be found in the sewage treatment plant, Maybe in the same location where you fight the Pulse, But after you cleaned the area and completed the quest there.
Fire Emblem is a series of games on nintendo consoles, Fire Emblem Heroes is a mobile game though, which is a gacha game and people tend to compare it to F/GO or Granblue.
That Mirror girl field also can work in disadvantage for her if you carry a few certain pokemon moves.
The only gym fields I can think that is fully in the opponents favor is Poison, Grass, That Chess Board and Maybe Water.
You know, I been thinking of something, Didn't Hardy play music? What if he plays Rock? What if his team will be based around Rocks and Music?
So that he like ends up having pokemon like Alola Golem, Exploude, Magneton maybe?
Maybe even Meloette and Diancie?