So, some Pokmon cards will be resistant to a specific type of Pokmon, while others may be able to be vulnerable to others
I prefer to play a full set of Ash Blossom, Effect Veiler, and Infinite Impermanence, as well as Crossout Designator targets of Ghost Belle, Mourner, and Ogre (your mileage may vary)
Even without other synergistic effects, you're effectively getting a 2/1 creature for with no extra card opportunity cost, which is far from a bad deal
Any enters-the-battlefield ability of the new creature will trigger
Fanatic of Rhonas One of the best additions to green ramp decks from MH3, Fanatic of Rhonas boosts these strategies heavily
[W][W] Hail Blizzard: 60x damage