Even if they arent the strongest power-wise, could they be an interesting build-around
Rule 0 The key to your combos in this deck is Rings of Brighthearth
With insane damage spread potential thanks to combining it with Froslass and Munkidori, Marnies Grimmsnarl exs ability to accelerate energy onto itself and other Marnies Pokemon combined with an effective Shadow Bullet is helping it edge out the competition
It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
The grounding within the plane is evident across the sets artwork right down the the special treatments
You can make one set on Kaladesh, and thus it will feel like a perfect fit