Key Stone

Key Stones are used along with a Pokémon with a Mega Stone to Mega Evolve. They are typically embedded in a personal accessory.

Known trainers with a Key Stone

 * Calem's Mega Ring (as the player or rival, uses on Absol)
 * Serena's Mega Ring (as the player or rival, uses on Absol)
 * Brendan's Mega Bracelet (as the player or rival)
 * May's Mega Bracelet (as the player or rival)
 * Wally's Mega Pendant (uses on Gallade)
 * Korrina's Mega Glove (uses on Lucario)
 * Lisia's Mega Hairpin (uses on Altaria)
 * Lysandre's Mega Ring (uses his specially invented cybernetic "Mega Ring" on Gyarados)
 * Maxie's Mega Glasses (uses on Camerupt)
 * Archie's Mega Anchor (uses on Sharpedo)
 * Diantha's Mega Charm (uses on Gardevoir)
 * Steven Stone's Mega Stickpin (uses on Metagross)
 * Zinnia's Mega Anklet (uses on Salamence)
 * Red (uses on Charizard - Mega Charizard X)*
 * Meyer (uses on Blaziken)*
 * Alain's Mega Ring (uses on Charizard to become Mega Charizard X)*
 * Remo's Mega Parasol (uses on Garchoo)*
 * Astrid's Mega Earring (uses on Absol)*
 * Siebold's Mega Buckle (uses on Blastoise)*
 * Gurkinn's Mega Glove (uses on Lucario)*
 * Mabel's Mega Staff (uses on Mawile)*

* - Anime only