I could see Dento's gym be a triple battle gym. Or his gym could go in so many ways:
-he could have all three, and you battle them 1 v 1 if you don't have three pokes on your team
-you could choose a type at the beginning, and he chooses the monkey that has the type advantage or disadvantage to that one (or something like this).
-he could just have the one that has a type advantage over your starter, determined when you pick it, and the gym would be about "overcoming type disadvantages"
Who knows, but I'm excited about the possibilities!
-he could have all three, and you battle them 1 v 1 if you don't have three pokes on your team
-you could choose a type at the beginning, and he chooses the monkey that has the type advantage or disadvantage to that one (or something like this).
-he could just have the one that has a type advantage over your starter, determined when you pick it, and the gym would be about "overcoming type disadvantages"
Who knows, but I'm excited about the possibilities!