Each strike has an independent chance of being a critical hit. Comet Punch may now continue attacking after breaking a substitute. If Comet Punch activates a target's Focus Band, no subsequent hits can knock it out.
If the user is holding a King's Rock, the final strike has a chance to cause the opponent to flinch.
Gust is now a Flying-type move and can hit a Pokémon during the semi-invulnerable turns of Fly and Bounce, and if it does, will deal double the damage.