A Macho Brace is a held item can be given to a Pokémon to double its EV gain from defeating other Pokémon. However, the holder's Speed will be halved while holding the brace. It can be obtained as a tier 2 special drop. It is a possible drop from rare boss Pokémon.
Before Reforged, this item had the following recipe. It was removed due to many held items being far too easy to make.