I only got one shiny doing the boost, but I also wasn't looking for them. At least the one I got was one I really wanted. XD
Not yet, sadly. Edit: Speaking of the devil, I went to the region hub right after posting this and got 5 forms of them in one go: green, indigo, orange, blue, and meteor.
DMs are the best place to find Minior, in my opinion. I've got the whole collection now! Except Shiny, I suppose...
spray max revive on the topic I only recently noticed we had minior running around now so I've started trying to catch them all.