To defeat Mega Mewtwo Y in Pokémon GO, attack it with Ghost, Dark, and Bug types like Shadow Tyranitar, Mega Gengar, and Dawn Wings Necrozma, and bring a large group. This is a "Super Mega Raid," a tougher tier than a normal raid, so plan for roughly 15 to 20 trainers rather than a small squad. Mega Mewtwo Y is a pure Psychic-type Legendary. It resists Fighting and Psychic moves, which rules out many popular attackers, so your team choice matters more than usual.
Table of Contents
- What makes this raid different
- Which types actually work
- Best counters to bring
- Weather, rejoins, and the catch
- Frequently Asked Questions
What makes this raid different
mega Mewtwo Y debuted in "Super Mega Raids," a new raid tier Niantic introduced at Pokémon GO Fest 2026: Global. The main event ran Sunday, July 12, 2026, from 10am to 7pm local time. This is not a standard five-star boss.
According to the Pokémon GO Hub raid guide, the Super Mega Raid version has doubled Attack, quadrupled Defense, and can use up to 10 shields. That combination stretches the fight far longer than a normal raid. Because of the inflated Defense and shields, a handful of trainers cannot win. The same guide recommends at least 10 participants, and practically 15 to 20 well-prepared accounts to close it out inside the timer.
Which types actually work
Mega Mewtwo Y is weak to Ghost, Dark, and Bug attacks, and it resists Fighting and Psychic, per Pokémon GO Hub's type data. Build your entire lineup around those three weaknesses.
Ghost and Dark give you the strongest options in most collections, while Bug is a useful backup if your Ghost and Dark benches are thin. Avoid Fighting types entirely, even though they are common Psychic counters in other fights—here they only lose damage.
Best counters to bring
The Pokémon GO Hub counters list names Dawn Wings Necrozma, Mega Tyranitar, Shadow Tyranitar, Mega Gengar, Shadow Giratina (Origin), and Darkrai as top picks. Shadow versions hit hardest, so use them when you have them.
For movesets, Pokébattler recommends pairing Ghost, Dark, or Bug fast and charged moves on each attacker: If you lack the marquee Legendaries, stack multiple Tyranitar or Gengar. Depth of six strong attackers matters more than one perfect Pokémon, given the shields and long fight.
- Tyranitar with Bite and Brutal Swing
- Mega Gengar with Lick and Shadow Ball
- Dawn Wings Necrozma with Shadow Claw and Moongeist Beam
Weather, rejoins, and the catch
Watch the weather before you start. The Pokémon GO Hub guide notes that Windy weather boosts Mewtwo's Psychic power, not your Ghost, Dark, or Bug counters—so Windy conditions make the raid harder, not easier. Because the boss can burn through many shields, plan to faint and rejoin quickly with a second team ready.
A fast rejoin keeps steady damage on the boss while shields drain. When you win, the caught Mewtwo lands at CP 2294–2387, or 2868–2984 if the weather is Windy, according to the same guide. If you missed the July 12 event, Poketory reports a make-up raid re-ran Mega Mewtwo Y on July 26, 2026.
Frequently Asked Questions
How many trainers do I need for Mega Mewtwo Y?
Pokémon GO Hub recommends at least 10, and practically 15 to 20, because of quadrupled Defense and up to 10 shields.
Why shouldn't I use Fighting types?
Mega Mewtwo Y resists Fighting and Psychic, so those attackers deal reduced damage. Stick to Ghost, Dark, and Bug.
Does Windy weather help me?
No. Windy boosts Mewtwo's Psychic moves rather than your counters, making the raid tougher.
