Pokémon Go features a variety of legendary Pokémon that possess unique Adventure Effects, offering players special gameplay bonuses. These effects are activated when a player has the corresponding Pokémon with its specific charged move unlocked and in their active party.
Mega Mewtwo X's "Mega Mewtwo X (Dynamic Punch+)" provides a concentrated punch for 10 minutes, increasing damage against Mega-Evolved Pokémon in raids and allowing a Mega-Evolved Pokémon to break two shields in Super Mega Raids. This effect costs 75 Mewtwo Mega Energy X and 5 Mewtwo Candy, requiring Mewtwo with Mega Mewtwo X unlocked.
Similarly, Mega Mewtwo Y's "Mega Mewtwo Y (Future Sight+)" lasts for 12 minutes and reveals when encountered Pokémon have high stats. It also costs 75 Mewtwo Mega Energy Y and 5 Mewtwo Candy, needing Mewtwo with Mega Mewtwo Y unlocked.
Legendary dragons also offer distinct advantages. Origin Forme Dialga's "Roar of Time" distorts time for 6 minutes, pausing the timers of Incense, Lucky Eggs, Star Pieces, and Daily Adventure Incense to extend their duration. This effect requires 5,000 Stardust and 5 Dialga Candy and is tied to Origin Forme Dialga with the Roar of Time charged move.
Origin Forme Palkia's "Spacial Rend" manipulates space for 10 minutes, enabling players to find and encounter Pokémon from farther away. This ability also costs 5,000 Stardust and 5 Palkia Candy, usable with Origin Forme Palkia possessing the Spacial Rend charged move.
For Kyurem, two forms offer unique effects. "White Kyurem (Ice Burn)" surrounds Pokémon with freezing wind for 10 minutes, slowing the target ring during encounters to make excellent throws easier and increasing catch rates, especially with connected accessory devices. This effect costs 5,000 Stardust and 5 Kyurem Candy and is linked to Kyurem with the Glaciate charged move fused with Reshiram.
"Black Kyurem (Freeze Shock)" casts electrically charged ice for 10 minutes, immobilizing Pokémon during encounters and also making them easier to catch with connected accessory devices. This also costs 5,000 Stardust and 5 Kyurem Candy and is associated with Kyurem with the Glaciate charged move fused with Zekrom.
The Necrozma fusions also provide notable bonuses. Dusk Mane Necrozma's "Sunsteel Strike" shines meteor-like light for 10 minutes, attracting Pokémon typically found during the day and enabling daytime evolution at night. It requires 3,000 Stardust and 3 Necrozma Candy, tied to Necrozma fused with Solgaleo.
Dawn Wing Necrozma's "Moongeist Beam" emits a sinister ray for 10 minutes, attracting Pokémon found at night and allowing nighttime evolution during the day. This effect also costs 3,000 Stardust and 3 Necrozma Candy and is linked to Necrozma fused with Lunala.
Regarding the Zacian and Zamazenta, Crowned Sword Zacian's "Behemoth Blade" is wielded for 6 minutes, strengthening Pokémon attacks in raids and Max Battles. This costs 5,000 Stardust and 5 Zacian Candy and requires Zacian transformed into its Crowned Sword form with the Iron Head charged move.
Crowned Shield Zamazenta's "Behemoth Bash" is also active for 6 minutes, enhancing Pokémon defense in raids and Max Battles. It shares the same cost of 5,000 Stardust and 5 Zamazenta Candy and requires Zamazenta in its Crowned Shield form with the Iron Head charged move.
Finally, Eternatus's "Dynamax Cannon" surge of power lasts for 10 minutes, adding a bonus to Max Moves used by Max Pokémon and Eternatus itself, with moves at the maximum level receiving a significant boost. This effect costs 5,000 Stardust and 5 Eternatus Candy and is linked to Eternatus with the Dynamax Cannon charged move.