Is there a walkthrough on where you can find all special pokemon?
I've not played since the very earliest builds and I have no clue where to get Braixen or Eevee
In the beta, you will end up fighting Braixen closer towards the end of the current build, shortly after beating the gym leader who uses fire pokemon.
Eevee you find during a quest given, where you have to find a lost book for the Professor (names are currently slipping the mind, sorry). The Eevee is burying and guarding the book.