There's no special graphic but you can just check for any of the changes - partner move BPs, version exclusive Pokemon spawns, number of Pokemon on boss teams, etc.
There's also a two-Pokemon Fisherman with a lvl 45 Kingler on that route (or the one right after it), it's no lvl 100 Gyarados but it seems like it might also be an error? Since every other trainer Pokemon there is about ten levels lower.
I understand your reasoning and I agree that they should feel like true boss battles, I just think there might be a good middle-ground between "three easy mini-bosses" and the current "three boss battles in the same room, two of which are tougher than the gym leader of that city". Either way, I...
I've been enjoying this romhack a lot, definitely feels like an improvement over the base game. There's been one area that feels a bit overtuned, and that's the Rocket Hideout boss room: After going through four floors of chump battles, you're met with a full team of 6, followed by a team of 4...
Thanks for your hard work! Re: Unhacking your Switch for Smash - do you see yourself working on a Pokemon 2019 romhack once that comes out? EDIT: Nevermind, you answered that in the OP!