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Power Bracer
From Pixelmon Wiki
A Power Bracer is a held item that can be given to a Pokémon. When a Pokémon holding a Power Bracer defeats an opponent Pokémon, it will earn the normal EV gains from the opponent along with 4 extra Attack EVs. However, the holder's Speed will be halved while wearing the Power Bracer. When a breeding Pokémon holds a Power Bracer, its Attack IV is guaranteed to be passed to its offspring. It is occasionally dropped by boss Pokémon or found in PokéLoot chests.
