Pokemon GO Leak Reveals Two HUGE Details About Mega Mewtwo

A pair of leaks about Mega Mewtwo in Pokemon GO are teasing some major details about the Pokemon needing significantly more Mega Energy and boasting a higher CP. The Mega-Evolved Gen 1 Legendary will be added to Pokemon GO during 2026’s GO Fest event.

GO Fest typically serves as one of the biggest events of the year for Pokemon GO, with 2026’s event looking to be no different. Niantic and The Pokemon Company have already confirmed the long-awaited addition of Mega Mewtwo X and Y during GO Fest 2026, set to be available both at in-person events and through Super Mega Raids. GO Fest 2026 has also seen plenty of leaks ahead of the event in July, teasing a multitude of Legendary Pokemon and Mega Raids set to appear during its weekend run. Now, Pokemon GO fans are learning that Mega Mewtwo’s addition to the game will feature some major changes from past Mega Pokemon.

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Pokemon GO’s Mega Mewtwo Comes With Big Changes

Mega Mewtwo X

7,500 Mega Mewtwo X Energy
339 ATK
215 DEF
228 SPD
Max CP: 6,910

Mega Mewtwo Y

7,500 Mega Mewtwo Y Energy
413 ATK
223 DEF
228 SPD
Max CP: 7,267

A recent post shared to Pokemon GO subreddit TheSilphRoad shares some major details about Mega Mewtwo’s implementation. Fans looking to Mega Evolve their old Mewtwos will need to amass a sizable sum of Mega Mewtwo Energy in Pokemon GO, with the Mega Evolution requiring 7,500 Energy for either form. Notably, Mewtwos caught during a Mega Raid within GO Fest 2026 will have the first level of Mega Evolution unlocked, with the steep requirements seemingly urging fans to catch new Mewtwos. GO Fest 2026’s live events will begin on May 29 in Tokyo, with events coming later in Chicago and Copenhagen, while GO Fest Global will run on July 11 and 12.

GameRant Quiz

Easy (15s)Medium (10s)Hard (5s)Permadeath (5s)

The high Mega Energy cost won’t be the only big change coming with the addition of Mega Mewtwo. Mega Mewtwo X and Mega Mewtwo Y will also boast higher stat totals than previous Mega Pokemon, with Mega Mewtwo X having 339 ATK and 215 DEF while Mega Mewtwo Y boasts 413 ATK and 223 DEF, with both sharing a 228 SPD stat. Mega Mewtwo X will max out at a potential total of 6,910 Combat Power in Pokemon GO, while Mega Mewtwo Y’s CP sits slightly higher at 7,267. The CP for both forms sits higher than any other Mega Pokemon in Pokemon GO, with only Eternatus having higher CP.

Mega Mewtwo’s addition during GO Fest 2026 will mark a major change for how Pokemon GO handles Mega Pokemon with two forms. Charizard is the only pre-existing Pokemon in the game to boast two different Mega Evolutions, with players previously able to choose either form when Mega-Evolving. An update to Pokemon GO on May 18 officially split Mega Charizard Energy into separate pools for Mega Charizard X and Y, with players being given an equal amount of each after the change. Pokemon GO is also expected to introduce Mega Raichu X and Y in the near future, which first appeared in Pokemon Legends: Z-A.

Who’s That Character?

Identify the silhouettes before time runs out.

Who’s That Character?

Identify the silhouettes before time runs out.

Easy (7.5s)Medium (5.0s)Hard (2.5s)Permadeath (2.5s)

2026 is primed to be a big year for Pokemon GO with lots on the way to celebrate its tenth anniversary. Pokemon GO officially introduced Super Mega Raids in 2026 as a brand-new form of Raid, featuring some of the most powerful Pokemon in the game. The mobile game also featured a special event to commemorate the anniversary in early March, making nearly every Pokemon available in the wild for a limited time. Pokemon GO fans should be excited at what’s to come for the game during its ongoing festivities.