Pokémon that would go wild if implemented

Dondozo with Water Absorb type can strongly counter Greninja or Feraligatr, and with Oblivious type, it's advantageous against stat-boosting attackers. Togekiss's usual Para-flinch strategy is strong. Breloom (or rather, Shroomish line) becomes a nuisance just by being hit with Spore, so it needs to be taken down quickly. And Flutter Mane, you're a no-go.