Mega Bracelet

This cuff contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.

Game descriptions

Sun, Moon, Ultra Sun, Ultra Moon:This cuff contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.
Sword, Shield, B.Diamond, S.Pearl:This cuff contains an untold power that somehow enables Pokémon carrying a Mega Stone to Mega Evolve in battle.
Scarlet, Violet:This bracelet contains an unknown power that somehow enables a Pokémon carrying a Mega Stone to Mega Evolve in battle.