Are you required to play a BASIC Pokemon in your 60 card deck? Or now could you just play the new Steam Siege Talonflame for instance? Thanks!
You are required to play a Basic Pokemon in every deck. Unfortunately, this means that a deck where 4 talonflame are the only Pokemon is not legal.
Here’s the source for that. Page 21 of the XY8 rulebook:
Lastly, your deck must have at least one Basic Pokémon in it.
Thanks for replies! I thought so, but I couldn’t find the rule! All the best!