for my first playthrough... it depends on what all the other Pokemon will be like.
if there are more awesome Pokemon that aren't Fairy type they will fill my team slots, if a Fairy type is good enough, I might use it.
I will definitely use some Fairy types at some point, I'm just not sure if I'm happy with how they will all turn out to be.
Sylveon isn't too appealing to me, same with that cotton candy one. And the Flamingo isn't in the version I'm buying... Xerneas is a legend so I'll save them up (and not use them in game). So I have to wait for more. I don't really want to use older Pokemon as well, cuz that would be boring (remember, I'm talking about my first playthrough).
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