Dual Chop inflicts damage, hitting twice per use. Each strike has an equal chance to be a critical hit.
Dual Chop will hit again if the first strike breaks a substitute. Bide and Counter will only acknowledge the second strike of this move.
If the target has an Ability that activates upon contact or a Rocky Helmet, each strike counts individually, enabling the Ability or Rocky Helmet to activate twice.
If the first strike activates the target's Focus Sash, Focus Band, or Sturdy, the second one will cause the defending Pokémon to faint. A Focus Band can still activate again to prevent fainting, but this chance is independent of the previous one.
If the user is holding a King's Rock, each consecutive hit has an equal chance to cause the opponent to flinch.