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Deals damage and has a priority of +1. Fails if the target does not use a direct attacking move in the same turn, or if the target moves before the user.
Sucker Punch is more powerful and more widely distributed than most other priority attacks, but it comes with a nasty side effect of failing if the opponent doesn't attack. Don't let that downside fool you, though; Sucker Punch is still extremely effective when used correctly. Quite a number of fast, hard-hitting, and problematic Pokemon, such as Gengar and Alakazam, fall easily to Sucker Punch. If you can predict your opponent's moves well, Sucker Punch can be a great source of coverage and a good primary STAB attack as well.