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Increases the accuracy of all moves used by the wielder (and its allies, in multi battles) by 10%. This is a multiplicative increase, not additive, meaning if a move has 50% accuracy before Victory Star, it is brought to 55% (0.5 * 1.1) total accuracy afterward.
Victini will often use lower-accuracy moves, such as V-create, Fire Blast, Overheat, Thunder, and Focus Blast, in order to gain much-needed power, and thus can almost freely use moves that other Pokemon would be hesitant to use. Be warned, however, that even a Victory Star-boosted Focus Blast is still less accurate than an unboosted Stone Edge or Hydro Pump. Victini has no other abilities, although in double or triple battles, this can be effective on Pokemon with Hustle.
Found in Dream World