Hello. I would just like to state that I am also playing this. I started with Vulpix and have been trying to keep my number of stones roughly balanced. Has it been 100% confirmed that each player will receive only one of the eeveelutions? If not do you think its possible the rainbow stones may have to do with getting multiple, possibly all 7 of them?
some other theories I had was perhaps you get one based on which pokemon type you have done the most games with.
also, I noticed that the only pokemon in this game not consisting of one of the 7 types seem to be normal type. I wonder if there is any sort of significance to that.
that said, regardless of which ones I get, I will be making a second account after I finish the game on this one so that I get at least two of them.
I'll be playing the games on a flash cart so whichever ones I get I'll help with extracting the event.