Can we answer the questions so, that we'll have to find the Eeveelutions that we want to find?
You'll get to obtain all of them, it's just the order that's different really. I made it so that you always find the one Neveah doesn't have until you both have them all, if that makes sense =P
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It works like this:
As an example, if you answer YES three times or YES, NO, NO at the start, Neveah will have Vaporeon and Flareon the first time you battle her and you will have to find Jolteon.
If you answer YES, YES, NO or YES, NO, YES, Neveah will have Jolteon and Vaporeon the first time you battle her and you will have to get Flareon.
If you answer NO, NO, YES or NO, YES, NO, Neveah will have Jolteon and Flareon the first time you battle her and you will have to find Vaporeon.
If you answer NO three times or NO, YES, YES, Neveah will have Flareon and Umbreon the first time you battle her and you will have to get Leafeon.
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It carries on and on like that until you have every Eeveelution =)
The Career Advisor interview answers you give will also affect things like your named Rival's party as you advance in the game, the Egg you can obtain in Green Eye Woods (should your first Alignment-altering event's result be "Good" if not you go to jail and get only one choice of egg), and a bunch of other stuff, but it's waaay too much for me to type up at this very moment. I'm hoping to make a detailed walkthrough soon though, as there are loads of things like this going on in the background people might not know about =P