What does the official announcement say about the 10th Anniversary Mewtwo?

Pokémon GO confirms free Timed Research leading to a Mewtwo with maxed-out stats and a Special Background. It also says the Mewtwo caught from the research will have the third Mega Level unlocked for Mega Mewtwo Y, subject to the separately noted Times Square exception.

Mewtwo Weakness in Pokémon GO: 10th Anniversary Timed Research

Q: When does the Pokémon GO 10th Anniversary Mewtwo Timed Research end?

Pokémon GO says the 10th Anniversary Timed Research runs from August 12, 2026, at 4:00 p.m. PDT until September 6, 2026, at 11:59 p.m. local time. Tasks and rewards must be completed and claimed before the local deadline.

Q: What is Mewtwo weak to by type?

Mewtwo is Psychic-type. In the standard type chart, Bug, Ghost, and Dark attacks are super effective against Psychic. Pokémon GO uses its own combat values and move system, so this is a type-only starting point rather than a live counter ranking.

Pokémon GO's 10th Anniversary Celebration includes free Timed Research that leads to a Mewtwo encounter. The official announcement schedules the research from August 12, 2026, at 4:00 p.m. PDT through September 6, 2026, at 11:59 p.m. local time. Complete the tasks and claim their rewards before the local deadline. Read Pokémon GO's official announcement.

This guide answers the type-chart question behind searches such as “Mewtwo weakness Pokémon GO.” It separates the official event details from Type Matchup's standard type-chart interpretation. It does not claim a specific live moveset, raid counter ranking, damage breakpoint, or outcome.

Official event facts vs. Type Matchup planning

Officially confirmed: The research is free and leads to a Mewtwo with maxed-out stats and a Special Background. Pokémon GO also says that the Mewtwo caught through this Timed Research has the third Mega Level unlocked for Mega Mewtwo Y. The announcement separately says players who caught Mewtwo at the July 9 Times Square event receive Mewtwo with different stats and rewards.

Type Matchup planning: Mewtwo is Psychic-type. In the standard core-series chart, Psychic is weak to Bug, Ghost, and Dark. Pokémon GO's battle system uses its own effectiveness multipliers, move availability, and formats, so type advantage is a useful starting point—not a promise that any named attacker is the best choice in a live battle.

What is Mewtwo weak to?

For a pure Psychic-type Pokémon, check these attacking types first:

Attacking type	Standard result against Psychic	Type-chart note
Bug	2× super effective	Bug is super effective against Psychic.
Ghost	2× super effective	Ghost is super effective against Psychic.
Dark	2× super effective	Dark is super effective against Psychic.
Fighting	½× effective	Psychic resists Fighting.
Psychic	½× effective	Psychic resists Psychic.

Start with Bug, Ghost, or Dark when you only need the standard type-chart answer. For the complete matchup, use the Psychic type guide, the Mewtwo weakness page, and the type matchup calculator. For broader Pokémon GO context, see the Pokémon GO type chart.

What to do before the deadline

The official announcement gives a local-time expiry for the research, so avoid waiting until the final day to begin it.

Check the Timed Research in Pokémon GO and complete its tasks before September 6 at 11:59 p.m. local time.
Claim the encounter before the deadline; unclaimed Timed Research rewards expire.
Use Bug, Ghost, or Dark as the standard-chart types to investigate if you are preparing for a Mewtwo matchup.
Check the live move and battle format before spending resources. Type advantage alone does not establish a Pokémon GO counter ranking.

What this guide does not claim

Recent community discussion shows strong interest in the free Mewtwo encounter, but community reports do not establish the event facts on this page. This guide therefore does not treat player reports about individual outcomes, Shiny availability, item rewards, or the best competitive use of the Mewtwo as confirmed unless Pokémon GO publishes them in the official announcement.

Mewtwo weakness FAQ

When does the Pokémon GO 10th Anniversary Mewtwo Timed Research end?

Pokémon GO says the research runs through September 6, 2026, at 11:59 p.m. local time. Its tasks and rewards must be completed and claimed before that deadline.

What is Mewtwo weak to by type?

Mewtwo is Psychic-type. Under the standard type chart, Bug, Ghost, and Dark are super effective. Pokémon GO's live moves, multipliers, and battle format still determine the practical result.

What does the official announcement confirm about the research encounter?

Pokémon GO confirms a Mewtwo with maxed-out stats and a Special Background from the free Timed Research. It also says the research Mewtwo has the third Mega Level unlocked for Mega Mewtwo Y, with a stated exception for players who caught Mewtwo at the July 9 Times Square event.

Does the official announcement name the best Mewtwo counters?

No. It describes the research reward and its deadline, but it does not give a counter ranking, moveset, damage calculation, or guaranteed battle outcome.