Mega Evolution

Details:
Introduced in Pokémon X & Y, Mega Evolution is a form of form change that can only happen once in battle. If you have the Key Stone, and the Pokémon's associated Mega Stone, then your Pokémon will change form. This typically involves a massive stat increase, as well as sometimes a type change.

In previous games, the Pokémon could only Mega Evolve when you have the Mega Stone attached. However, in Pokémon Let's Go, Pikachu! & Let's Go, Eevee!, this has changed somewhat as now you have the ability to select between the different Mega Evolutions of Charizard rather than have it be decided by the item being held. All you need is the Mega Stone in your inventory and the Key Stone hold item and you can activate Mega Evolution at any time.

Kanto Pokédex Mega Evolutions

No. Pic Name Type Base Stats Mega Stone Location
HP Att Def S.Att S.Def Spd
#003
Mega Venusaur 80 100 123 122 120 80 Pallet Town - From Blue (After beating Cinnabar Gym)
#006
Mega Charizard X 78 130 111 130 85 100 Pallet Town - From Blue (After beating Cinnabar Gym)
#006
Mega Charizard Y 78 104 78 159 115 100 Pallet Town - From Blue (After beating Cinnabar Gym)
#009
Mega Blastoise 79 103 120 135 115 78 Pallet Town - From Blue (After beating Cinnabar Gym)
#015
Mega Beedrill 65 150 40 15 80 145 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#018
Mega Pidgeot 83 80 80 135 80 121 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#065
Mega Alakazam 55 50 65 175 105 150 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#080
Mega Slowbro 95 75 180 130 80 30 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#094
Mega Gengar 60 65 80 170 95 130 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#115
Mega Kangaskhan 105 125 100 60 100 100 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#127
Mega Pinsir 65 155 120 65 90 105 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#130
Mega Gyarados 95 155 109 70 130 81 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#142
Mega Aerodactyl 80 135 85 70 95 150 Indigo Plateau - Stone Salesman (After Beating Elite Four)
#150
Mega Mewtwo X 106 190 100 154 100 130 Cerulean Cave - From Green
#150
Mega Mewtwo Y 106 150 70 194 120 140 Cerulean Cave - From Green