Birkal
We have the technology.
Alternatively, you can find this information posted on the Smogon Double Battle Article, written by muffinhead and Cassie."Moves that hit multiple Pokémon have their power reduced to 75% of their normal base power, unless all other Pokémon have fainted at that point." ~Bulbapedia
It's a great article; I recommend it to anyone looking to get into the world of doubles battles!In double battles, attacks that hit both opposing Pokemon are called spread attacks, and are only 75% of their usual base power. Spread attacks hit the teammate's Pokemon first, and then all of the opponent's Pokemon at the same time.