MM · DATAMINE · GO FEST 2026 DEBUT
JULY 11 → 12
Mega Mewtwo X + Y get Adventure Effects + Plus moves
Datamined in app versions 4.13.0 and 4.15.0: Mega Mewtwo X gets Dynamic Punch+ (Fighting), Mega Mewtwo Y gets Future Sight+ (Psychic). Both come with custom Adventure Effects tagged 'Mega X Bonus' and 'Mega Y Bonus'. Debut at Global GO Fest 2026 (July 11-12) in Super Mega Raids. Here's what we know, what we expect, and how to prep.
THE HEADLINE
For the first time, a Mega Evolution gets BOTH a custom fast/charged move pool AND a per-form Adventure Effect. This is the most ambitious move-pool change since the Apex Pokémon (Shadow Apex Ho-Oh + Lugia) and signals Niantic intends Mega Mewtwo to be a tentpole for the rest of the season.
THE TWO FORMS
Psychic / Fighting · Saturday Super Mega Raid (July 11)
Mega Mewtwo X
Featured fastCounter (Fighting fast move debut for Mewtwo)Plus moveDynamic Punch+ (Fighting)Gym/raid~110-115 power (estimated, Apex parallel)PvP~90 damage + likely Defense ×2 buff (Dynamic Punch base = self-Atk buff)
EXPECTED ADVENTURE EFFECT
Most likely raises Mega X attack stat further OR provides a raid utility like multi-shield-break in Super Mega Raids. Apex Sacred Fire++ on Shadow Apex Ho-Oh raises ATK + 8% — Mega Mewtwo X may follow that template.
RAID ROLE
#2 Fighting attacker (behind Mega Lucario). #2 Psychic attacker (behind Mega Mewtwo Y). Counter + Dynamic Punch+ moveset would push Fighting damage above current #1 Mega Lucario in some matchups.
PVP ROLE
Banned in CP-limited leagues but a top-3 Master League contender. Counter is the best Fighting fast move overall; Dynamic Punch+ as a second charged would make it a 2-move threat to almost everything.
BEST FOR
- · Fighting raids (Dialga, Origin Dialga, Mega Steel raids)
- · Psychic backup vs Mega Gengar, Necrozma
- · Master League team lead
- · Super Mega Raid shield breaking (any Mega does it; X is most efficient)
Psychic · Sunday Super Mega Raid (July 12)
Mega Mewtwo Y
Featured fastPsycho Cut (existing) + Confusion accessPlus moveFuture Sight+ (Psychic)Gym/raid~135-140 power (estimated, large damage)PvP~120 damage + likely effect (Future Sight base has self-Atk buff on hit)
EXPECTED ADVENTURE EFFECT
Could raise base ATK or extend Mega evolution duration. Or could affect catch encounter — Mewtwo lore. Less clear than X; expect Niantic to lean into "outright power" rather than utility.
RAID ROLE
The undisputed #1 Psychic attacker. Confusion + Future Sight+ moveset would let it dump damage faster than ever. Ideal vs Fighting and Poison raid bosses.
PVP ROLE
Top Master League. Y's stat distribution leans heavy into ATK, making it a glass cannon — Future Sight+ as a heavy nuke + Psycho Cut spam is a closer's dream.
BEST FOR
- · Psychic raids (Mega Lucario, Mega Heracross, Mega Toxapex)
- · Mega Gengar counter (Psychic > Poison/Ghost halves)
- · Master League closer
- · Super Mega Raid shield breaking (after X if you have both)
HOW PLUS MOVES WORK — APEX PRECEDENT
The "plus" suffix on a charged attack is borrowed from Apex Pokémon. Apex moves hit harder than the base version AND carry a secondary effect on use. Niantic reuses this template for Mega Mewtwo:
Shadow Apex Ho-Oh
Sacred Fire++
Raises user ATK + 4-8% per use, plus higher base power vs regular Sacred Fire
Shadow Apex Lugia
Aeroblast++
Same pattern — boosted base power + secondary buff on self
Why this matters: Apex moves roughly 1.6-2× the value of the base move when factoring in the secondary buff/debuff. Applied to Mega Mewtwo, Dynamic Punch+ and Future Sight+ become the strongest Fighting and Psychic moves in the game by a comfortable margin.
TIMELINE — FROM DATAMINE TO DEBUT
v4.13.0 datamine
PokéMiners discovers "Mega Y bonus" + "Mega X bonus" Adventure Effect tags (no further details).
v4.15.0 datamine
PokéMiners finds Mega Mewtwo tutorial assets + placeholder UI. "Dynamic Punch+" and "Future Sight+" strings appear.
June 9-15, 2026
Candela event — preparation window for trainers banking Stardust + Candy XL for the eventual L50 push.
June 20, 2026
Frigibax CD — Ice attackers built here will be useful at GO Fest two weeks later.
July 11, 2026
Mega Mewtwo X debuts in Saturday Super Mega Raids at Global GO Fest. Adventure Effect goes live.
July 12, 2026
Mega Mewtwo Y debuts in Sunday Super Mega Raids. Both Megas should be available globally by Monday.
Post GO Fest
Mega Mewtwo X + Y expected to enter regular Mega raid rotation 4-8 weeks after debut.
RELATED · GO FEST PREP
PRIORITY GUIDE
GO Fest power-up plan →
8 Pokémon to invest in before July 11. Counters for both Mewtwo forms included.
EVENT
Global GO Fest 2026 →
Full raid roster, region locks, hour-by-hour schedule.
FUTURE
Unreleased Megas →
Mega Mewtwo X + Y plus Mega Baxcalibur, Mega Garchomp and others.
NEW
Spotlight Hour returns →
Thursday schedule + Daily Discoveries refresh.
HUB
All Mega Evolutions →
Every available Mega with stats and recommended movesets.
RANKINGS
Attacker tier list →
Where current top Psychic and Fighting attackers sit before Mewtwo lands.
FAQ
What are the Mega Mewtwo X and Y Adventure Effects?
Per the 4.13.0 datamine, Mega Mewtwo X gets an Adventure Effect tagged "Mega X Bonus" and Mega Mewtwo Y gets one tagged "Mega Y Bonus". The exact effect text was not in the datamine — only the variable names. Based on the parallel "plus" moves discovered in 4.15.0 (Dynamic Punch+ for Mega X, Future Sight+ for Mega Y) and the precedent set by Shadow Apex Ho-Oh + Lugia, expect the effect to either boost the user's ATK on the move OR provide a raid utility like multi-shield-break in Super Mega Raids.
What is Dynamic Punch+?
A "plus" version of the regular Dynamic Punch charged attack, exclusive to Mega Mewtwo X. Plus moves follow the Apex Pokémon precedent — they hit harder than the base move AND carry a secondary effect. Apex Sacred Fire++ deals ~8% more damage and raises the user's ATK stat by 1 stage; expect Dynamic Punch+ to do something similar, likely raising ATK by 2 stages (matching Dynamic Punch's base effect).
What is Future Sight+?
A Psychic plus-version exclusive to Mega Mewtwo Y. Regular Future Sight has high base power (~120 PvE) but slow energy generation. The plus version likely adds either higher damage, an ATK buff to the user, or possibly a 2-stage Defense debuff to the target. Niantic hasn't published the spec — release-day testing will confirm.
Do I need to raid the X and Y forms separately at GO Fest?
Yes. Mega Mewtwo X and Y are different forms — they do NOT share Mega Energy in Pokémon GO. Saturday is X day (X-form Super Mega Raid only). Sunday is Y day. To get both forms you must raid both days. Both can be evolved from any caught Mewtwo (including ones from old raids) — the form is determined by which Mega Energy you spend.
Mega Mewtwo X or Mega Mewtwo Y — which should I prioritize?
Depends on your collection. If you already have Mega Mewtwo Y energy banked (rare — it hasn't been released), prioritize X. Otherwise: Mega Mewtwo X gives you both a #2 Fighting attacker AND a top-3 Psychic option, which is more versatile coverage. Mega Mewtwo Y is the pure #1 Psychic specialist. For most trainers: X first, Y second.
How does this fit with the broader GO Fest 2026 power-up plan?
Mega Mewtwo X and Y are the headliners. The full /global-go-fest-2026/power-up guide ranks 8 Pokémon to power up BEFORE the event — Mega Rayquaza (#1 counter for X), Dawn Wings Necrozma (#1 counter for Y), Crowned Sword Zacian, and others. Build those first, then raid X and Y, then add them to the team for future events.
Will Mega Mewtwo X / Y have the Adventure Effects available right away?
Tutorial assets were datamined in 4.15.0, which usually rolls out ~2 weeks before the event. Expect the Adventure Effects to be available the moment you Mega Evolve your first X or Y on July 11 or 12. Each Adventure Effect typically has a single-use-per-Mega-evolution restriction.
What about regular Mewtwo's moves — anything new?
No. The plus moves (Dynamic Punch+, Future Sight+) are exclusive to the Mega forms. A regular Mewtwo with Confusion / Psycho Cut / Psystrike / Shadow Ball stays the same. Evolving into Mega X or Mega Y temporarily grants access to the plus move; reverting to base form removes it.