Adding to this further, if you decided to use Archie's Ace in the Hole (or Maxie's Hidden Ball Trick) with a Mega Evolved or Primal Pokemon, since none of your already-benched Pokemon are "becoming" that Pokemon, your turn does not end! In PokePop's words, "How about them apples?"
Also a general reminder. You can't use either card if your bench is full or there is no Pokemon in your discard to put onto your bench. The way Archie and Maxie are worded requires that you put a Pokemon from your discard into your bench, and only then can you draw five cards. So, if this condition isn't met, you can't play them to draw five cards, even if it's the last card in your hand.