The game has just started between Player A and Player B and it is decided that Player A goes first. I understand Player A cannot play any Trainers, Supporters, or Stadiums nor evolve any Pokemon in play. In that effect, Player A would just attract an energy and attack. It is now Player B's turn. I understand that Player B can play Trainers, Supporters, and Stadiums. In that effect, Player B uses Celio's Network and takes a stage 1 Pokemon that could evolve on one of the Pokemon that he already has in play. Now my question is the Player B allowed to evolve? How about if Player B already had that stage 1 in his/her hand?