Is there some fuckery going on with auto battling Minior?
Sometimes my Pokemon will refuse to auto battle them as if they were a shiny, but when I expose their core, they aren't. I've tried experimenting around and it seems like my Poliwrath, Granbull, and Hitmontop refuse to fight Blue Cores, but my Chandelure has no problem with it. I don't get it. Is this a bug?

Also general Shiny Hunt thread I guess