So here's the thing: I'm trying to catch all the different Minior colors, but most of the Miniors use Self Destruct before I can see their core color. Is there a way to tell the color of a Minior with its shield on?
Like Fizz said, use a Pokemon with the Damp ability, as well as the move False Swipe/Hold Back. As for seeing its core color, no, because you can't disable Minior's ability, and nothing outside of that could work.