Why do the exteriors have to be different? Can't they all be the same like in the original games? Also, I would like to help for the design of the interior. I wouldn't use regular tile sets, it would just be a very basic map of the gym, but with puzzle elements mixed into it. I don't think we have to worry about Froy's gym in the way of puzzle elements, because it seems to be a pattern that the first gym never has any kind of puzzle elements, just a straight path to the leader with a couple trainers, sometimes with another path to avoid said trainers. It's the other eleven gyms where puzzles may need to be thought of. Someone else suggested a trivia sort of thing for Softwind, which makes sense. The grass gym could have pitfalls that send you down to the basement where trainers lurk. Ice gym could be freezing and melting ice. I'll try to make something for the first couple of gyms, just because I want something to do.