Download
The Pokémon compares an opposing Pokémon's Defense and Sp. Def stats before raising its own Attack or Sp. Atk stat—whichever will be more effective.
Pokémon with this ability3 Pokémon
FAQ
What does Download do?
The Pokémon compares an opposing Pokémon's Defense and Sp. Def stats before raising its own Attack or Sp. Atk stat—whichever will be more effective.
Which Pokémon have Download?
3 Pokémon have it, e.g. Porygon, Porygon2, Porygon-Z.