Mega Evolution (GO)

Mega Evolution (Japanese: メガシンカ Mega Evolution) is a temporary transformations that certain Pokémon can undergo. Mega Evolution was introduced to on August 27, 2020. Like in the core series, Mega Evolution significantly increase a Pokémon's stats and potentially change its type, but its moves will remain the same. However, rather than using a Mega Stone, an eligible Pokémon instead consumes Mega Energy to activate this temporary transformation. In addition, several type-based bonuses take effect while Mega Evolution is active, and become more powerful for Pokémon that have undergone Mega Evolution many times.
Primal Reversion (Japanese: ゲンシカイキ Primal Regression) was introduced on February 18, 2023. Rather than using the Blue Orb or Red Orb, eligible Pokémon consume Primal Energy to activate Primal Reversion. In Pokémon GO, Primal Reversion is treated as a special type of Mega Evolution. The two operate nearly identically, but Primal Reversion is more powerful: it grants bonus effects to more types than Mega Evolution, and its damage bonuses in and s remain active the entire time a Primal form is in the party, not just when it is the active party member.
==Activation==
Activating Mega Evolution or Primal Reversion for a Pokémon the first time costs a large amount of species-specific Mega Energy or Primal Energy. Mega Evolution and Primal Reversion last eight hours, after which that Pokémon will enter a rest period for several days. As the rest period counts down, the Energy cost to reactivate Mega Evolution or Primal Reversion decreases proportionally until it reaches 0 at the rest period's end. Mega Evolution and Primal Reversion can be activated anytime during the rest period, so long as the player has enough Energy.
Repeatedly activating Mega Evolution or Primal Reversion on the same Pokémon will increase its Mega Level or Primal Level. A higher Mega or Primal Level reduces both the initial Mega or Primal Energy activation cost and the length of the rest period, making frequent activation far cheaper and easier.
A player can only have one active Mega Evolution or Primal Reversion at a time. Activating Mega Evolution or Primal Reversion on a second Pokémon will revert the first to its base form and start its rest period.
On top of the Mega Energy cost, activating Rayquaza's Mega Evolution also requires that it know the move . Rayquaza can learn Dragon Ascent by consuming a Meteorite.
 and Clone Pokémon cannot Mega Evolve, but Purified Pokémon and other event forms can. Active Mega-Evolved Pokémon cannot be deployed to defend s, stationed at s, d, powered up, or ed. Trading a Pokémon resets all progress towards Mega Levels or Primal Levels, and its recipient must pay the full initial amount to activate Mega Evolution or Primal Reversion.
===Costs===
The following shows the possible costs to activate Mega Evolution or Primal Reversion. The subsequent activation costs decreases with the Pokémon's Mega Level or Primal Level.
Initial cost	Base Level	High Level	Max Level
100 	20 	10 	5
200 	40 	20 	10
300 	60 	30 	15
400 	80 	40 	20
==Effects==
Mega Evolution and Primal Reversion grant a variety of type-specific bonuses for an eight-hour period of time, with some having different types from their base forms. Activating Mega Evolution or Primal Reversion will restore a fainted or damaged Pokémon to full HP.
* For Mega Evolution, type bonuses match the Mega-Evolved Pokémon's types
* For Primal Reversion and Mega Rayquaza, type bonuses match their associated conditions:
** For Primal Kyogre, these bonuses are applied are to , , and types, the same types boosted by Rainy weather.
** For Primal Groudon, these bonuses are applied are to , , and types, the same types boosted by Sunny weather.
** For Mega Rayquaza, these bonuses are applied to , , and types, the same types boosted by Windy weather.
Costumes are not visible on Pokémon that are Mega Evolved.
===In battle===
Mega Evolution and Primal Reversion temporarily boost the base stats of a Pokémon. They can be used in all types of battles, except in the GO Battle League outside of special events.
When used in and s, Mega Evolution and Primal Reversion provides special damage bonuses to all allies:
* ×1.3 damage for all moves whose types are boosted by Mega Evolution or Primal Reversion
* ×1.1 damage increase for all other ally Pokémon's moves
Mega Evolution typically requires the Mega-Evolved Pokémon to be present on the battlefield for the damage bonuses to be active. For Primal Reversion and Mega Rayquaza, they only need to be present within the party that has any member on the battlefield; the damage bonuses are active even if the transformed Pokémon is never sent out or has fainted.Primal Boost remains active even though The Primal Reversion Pokemon is NOT in battle 
Multiple players can use Mega Evolution or Primal Reversion in the same battle, but the damage bonuses will not stack. Each attack only will receive the highest applicable damage bonus.
Note that the damage bonus is not applied to the user or, for Primal Reversion and Mega Rayquaza, its own party. However, if multiple players use Mega Evolution or Primal Reversion, they can boost each other.
===Catching Pokémon===
Outside of battle, special bonuses are applied for catching Pokémon that have at least one of the Mega Evolution's or Primal Reversion's boosted types:
* Bonus 
** This bonus also applies to any Pokémon caught from a raid, regardless of type
* Increased chance of Candy XL (unlocked at High level)
** This is a flat rate, depending on Mega Level, added to the success rate for each possible Candy XL.
* Bonus XP (unlocked at High level)
===Walking a Buddy Pokémon===
Once a Pokémon's Mega Evolution or Primal Reversion is registered to the Pokédex, walking any Buddy Pokémon from its evolutionary line will also yield its respective Mega Energy or Primal Energy whenever it finds (at 5 Energy per km). Energy can be found this way regardless of whether there is a Mega Evolution or Primal Reversion active.
==Level==
Mega Levels were introduced on April 28, 2022, as part of an update to Mega Evolutions. As a Pokémon's Mega Level or Primal Level increases, the additional perks for Mega Evolving it improve. Each Pokémon can increase its progress towards the next Mega or Primal Level by undergoing Mega Evolution or Primal Reversion, up to once per day. Mega and Primal Levels are completely reset if a Pokémon is traded.
It takes at least 30 days for a Pokémon to reach Max Level, Mega Evolving it once each day. For a Pokémon that costs 100/200/300 to initially Mega Evolve, it would take at least 406/783/1160 total to reach Max Level within the minimum 30 days required, and waiting exactly 24 hours in between. If the player chooses to only perform subsequent Mega Evolutions without using Mega Energy, it will take at least 157 days (about 5 months) after the initial Mega Evolution to reach Max Level. In both ideal cases, the player cancels the Mega Evolution immediately to initiate the rest period timer.
Bonus 	Base Level	High Level	Max Level
Mega Evolutions required 	1 	7 	30
Rest period 	7 days 	5 days 	3 days
Mega Energy cost reduction	80% 	90% 	95%
Catch Candy Bonus 	1 	1 	2
Increased Candy XL Chance 	— 	+10% 	+25%
Catch XP Bonus 	— 	+50 XP 	+100 XP
==Mega and Primal Raids==
Mega-Evolved Pokémon and Primal Reversions may appear as Raid Bosses for Mega Raids and Primal Raids, respectively. Upon completion, the raid rewards a large amount of Energy that correspond to the Raid Boss, and the amount depends on how quickly the raid was completed. Each Mega Raid yields between 150 to 250 Mega Energy, and each Primal Raid yields between 60 to 100 Primal Energy. Upon defeat, the Raid Boss will revert to its normal form and can be caught as such during the bonus challenge.
As Pokémon GO has not featured Mega Diancie in raids, Mega Diancie Energy was instead made available during GO Fest 2023 through Carbink raids and catching wild Carbink, with the 2024 Glitz and Glam Special Research allowing Mega Diancie Energy through the Special Research and quests.
==List of Mega Evolutions and Primal Reversions==
Resource	Resource 	Pokémon	Pokémon	Boosted Types	Initial Cost	Release date
 	Venusaur Mega Energy 	 	Mega 	 	200 	August 27, 2020
 	Charizard Mega Energy 	 	Mega X	 	200 	August 27, 2020
 	Charizard Mega Energy 	 	Mega Y	 	200 	August 27, 2020
 	Blastoise Mega Energy 	 	Mega 	 	200 	August 27, 2020
 	Beedrill Mega Energy 	 	Mega 	 	100 	August 27, 2020
 	Pidgeot Mega Energy 	 	Mega 	 	100 	September 18, 2020
 	Alakazam Mega Energy 	 	Mega 	 	200 	September 12, 2022
 	Slowbro Mega Energy 	 	Mega 	 	100 	June 8, 2021
 	Gengar Mega Energy 	 	Mega 	 	200 	October 23, 2020
 	Kangaskhan Mega Energy	 	Mega 	 	200 	April 29, 2022
 	Pinsir Mega Energy 	 	Mega 	 	200 	May 11, 2023
 	Gyarados Mega Energy 	 	Mega 	 	300 	February 9, 2021
 	Aerodactyl Mega Energy	 	Mega 	 	200 	January 7, 2022
 	Ampharos Mega Energy 	 	Mega 	 	200 	January 19, 2021
 	Steelix Mega Energy 	 	Mega 	 	200 	December 1, 2021
 	Scizor Mega Energy 	 	Mega 	 	200 	August 10, 2022
 	Heracross Mega Energy 	 	Mega 	 	200 	April 13, 2024
 	Houndoom Mega Energy 	 	Mega 	 	100 	October 1, 2020
 	Tyranitar Mega Energy 	 	Mega 	 	300 	July 25, 2023
 	Sceptile Mega Energy 	 	Mega 	 	200 	December 3, 2022
 	Blaziken Mega Energy 	 	Mega 	 	200 	December 3, 2022
 	Swampert Mega Energy 	 	Mega 	 	200 	December 3, 2022
 	Gardevoir Mega Energy 	 	Mega 	 	200 	February 8, 2023
 	Sableye Mega Energy 	 	Mega 	 	100 	June 29, 2023
 	Mawile Mega Energy 	 	Mega 	 	100 	October 12, 2024
 	Aggron Mega Energy 	 	Mega 	 	200 	September 16, 2022
 	Medicham Mega Energy 	 	Mega 	 	100 	March 8, 2023
 	Manectric Mega Energy 	 	Mega 	 	100 	March 16, 2021
 	Altaria Mega Energy 	 	Mega 	 	300 	May 15, 2021
 	Banette Mega Energy 	 	Mega 	 	100 	October 20, 2022
 	Absol Mega Energy 	 	Mega 	 	200 	October 22, 2021
 	Glalie Mega Energy 	 	Mega 	 	200 	December 15, 2022
 	Salamence Mega Energy 	 	Mega 	 	300 	January 10, 2023
 	Latias Mega Energy 	 	Mega 	 	300 	May 3, 2022
 	Latios Mega Energy 	 	Mega 	 	300 	May 3, 2022
 	Kyogre Primal Energy 	 	Primal 	 	400 	February 18, 2023
 	Groudon Primal Energy 	 	Primal 	 	400 	February 18, 2023
 	Rayquaza Mega Energy 	 	Mega 	 	400 	August 4, 2023
 	Lopunny Mega Energy 	 	Mega 	 	200 	April 4, 2021
 	Garchomp Mega Energy 	 	Mega 	 	300 	November 11, 2023
 	Lucario Mega Energy 	 	Mega 	 	200 	July 27, 2024
 	Abomasnow Mega Energy 	 	Mega 	 	200 	December 1, 2020
 	Gallade Mega Energy 	 	Mega 	 	200 	January 11, 2025
 	Diancie Mega Energy 	 	Mega 	 	300 	August 4, 2023
==Updates==
* Prior to September 3, 2020, subsequent Mega Evolutions required 25% of the initial Mega Energy (instead of 20%)
* Prior to October 15, 2020, Mega Evolution lasted four hours (instead of eight).
* Prior to 0.189.0 update, there was a bug that caused Mega-evolved Pokémon to be more powerful depending on the level the Pokémon was powered up from.
* Mega levels and its related perks were introduced on April 28, 2022.Celebrate the Global launch of the Mega Evolution update with Mega Kangaskhan and a Mega Moment event! Prior to this update:
** For a Pokémon with multiple Mega Evolutions, the cost reduction only applies to forms it has previously Mega Evolved into. So if a has previously evolved into Mega Charizard X for the first time, then it would cost 40 to evolve into Mega Charizard X again, but 200 to evolve into Mega Charizard Y.
** A Pokémon that has previously Mega Evolved and is then traded will still cost a reduced amount to Mega Evolve.
==References==
==Related articles==
Category:Pokémon GO
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