A list of Mega Stones available in Let's Go Pikachu and Eevee and where to find them.
| Stone | Location |
|---|---|
| Key Stone | Obtained from Blue in Pallet Town after obtaining seven Badges and meeting the Rival in front of Viridan Gym. |
| Venusaurite | Obtained from Blue in Pallet Town after obtaining seven Badges and meeting the Rival in front of Viridan Gym. |
| Charizardite X | Obtained from Blue in Pallet Town after obtaining seven Badges and meeting the Rival in front of Viridan Gym. |
| Charizardite Y | Obtained from Blue in Pallet Town after obtaining seven Badges and meeting the Rival in front of Viridan Gym. |
| Blastoisinite | Obtained from Blue in Pallet Town after obtaining seven Badges and meeting the Rival in front of Viridan Gym. |
| Beedrillite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Pidgeotite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Alakazite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Slowbronite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Gengarite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Kangaskhanite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Pinsirite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Gyaradosite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Aerodactylite | Purchase from the Mega Stone Seller at Indigo Plateau for 30000. |
| Mewtwonite X | Obtained from Green in Cerulean Cave after defeating her. |
| Mewtwonite Y | Obtained from Green in Cerulean Cave after defeating her. |