Mega Evolution goes beyond the limits of regular Evolution. Only certain Pokémon can Mega Evolve. Doing so imparts power greater than regular Evolution by temporarily unleashing the energy hidden within the Pokémon. Pokémon change their appearance when they Mega Evolve, and certain Pokémon may even change types.
When Trainers have a strong bond with their Pokémon, a Key Stone worn by the Trainer resonates with a Mega Stone held by their Pokémon, allowing Mega Evolution to take place. Eventually, you’ll wear a Mega Ring with a Key Stone embedded in it. Other Trainers may wear their Key Stones in different ways.
