Since the very first Pokémon games ever, Mewtwo has been one of the most powerful and coveted pocket monsters out there. So how can players get one in Pokémon: Let’s Go, Pikachu and Let’s Go, Eevee?

Pokémon: Let’s Go, Pikachu and Eevee we’re only just released last week and already players are reaching the end-game and trying to collect Pokémon #150. Fans of the original Pokémon Red, Blue, and Yellow might remember how they acquired Mewtwo 20 years ago. The method remains mostly unchanged for Let’s Go: Players gain access to a location called Cerulean Cave, but only after they beat the Elite Four to become Pokémon League Champion.

Be sure to bring plenty of Ultra Balls before going on this adventure and be prepared for a fight against one of the strongest Legendary Pokémon out there. Mewtwo will be at level 70 during your encounter so using the game’s single Master Ball on Mewtwo is totally viable.

Of course, before that you’ll have to actually find him, Cerulean Cave has plenty of loot off the main path, but for the purposes of this guide, we’ll take you directly to Mewtwo.

'Pokemon, Let's Go' Mewtwo
Mewtwo is a formidable confrontation in 'Let's Go'.

Cerulean Cave is (obviously) near Cerulean City. Players need to go north from the city to Route 24 and then Sea Skim south until they reach the cave entrance. The non-player character that formerly guarded the entrance will now do battle with you before granting entry to the cave.

From the entrance, head north to the stream and follow that to a ladder located to the east leading up. On the second floor, one of the ladders in the northwest corner leads back down two stories to what’s essentially a basement level. Follow the path down there to the east and then south. Eventually, the path will wind back west, ending at a body of water where you’ll find Mewtwo on an island.

Unlike in other Pokémon games, you’ll have to fully defeat Mewtwo before entering the catching phase, so there’s no point in pulling your punches. Focus on hitting it with Dark, Ghost, or Bug moves for the bonus damage, and try to inflict status effects like Frozen, Paralysis, Sleep to help make it a bit easier. After you’ve successfully captured Mewtwo, you’ll encounter your rival for a brief conversation before battling a new trainer called “Green,” a nice callback to previous versions of this story.

If all this seems like too much trouble, consider just waiting for Super Smash Bros. Ultimate, where Mewtwo will be a playable character yet again.

Pokémon: Let’s Go, Pikachu and Eevee is now available for the Nintendo Switch.

Photos via The Pokemon Company