Pokemon say what they evolve from. Generally, there is only 1 card name that is applicable. If there is more than 1 applicable card name it can evolve from, it will say so. To date, only Blissey ex and Scizor ex from Unseen Forces have ever done this I believe, being able to evolve from either Chansey or Chansey ex/Scyther or Scyther ex respectively, and say so in the "evolves from" text.