At Join Avenue's Market, X Accuracy can be bought in dozens at 8550 each, which equates to 712.5 per X Accuracy.
Effect
Generations I to II
When used from the Bag during battle, it makes the Pokémon's moves ignore accuracy checks.
Generations III to VI
When used from the Bag during battle, it raises the accuracy of a Pokémon currently in battle by 1 level. It also increases the Pokémon's friendship a little. One-hit knockout moves are no longer affected by X Accuracy.
Generation VII onward
When used from the Bag during battle, it raises the accuracy of a Pokémon currently in battle by 2 levels. It also increases the Pokémon's friendship a little. One-hit knockout moves are unaffected by X Accuracy.
Wonder Launcher
The X Accuracy appears as four Wonder Launcher items, increasing Accuracy by 1, 2, 3, or 6 stages. It costs 3, 5, 7, or 11 points to use respectively.
X Accuracy is a Trainer card introduced in the Next Quest expansion. When used, if the targeted Pokémon spins a Miss in battle on that turn, it spins again.
In Pokémon Duel, X Accuracy is a Plate. When used, if the targeted Pokémon spins a Miss in battle on that turn, it will shift to the next wheel segment.