If you are trying to evolve Galarian Yamask Pokémon GO and the evolve button is still unavailable, you may be missing a special requirement. Unlike many Pokémon that evolve simply by collecting candy, Galarian Yamask requires players to complete a specific challenge before the evolution becomes possible.
Many trainers collect the necessary candy but are confused when the evolution option remains locked.
This guide explains exactly how to evolve Galarian Yamask Pokémon GO and how to complete the raid requirement.
How to Evolve Galarian Yamask Pokémon GO

To evolve Galarian Yamask Pokémon GO you must complete two requirements before the evolution becomes available.
First, Galarian Yamask must be set as your buddy Pokémon. While it is your buddy, you must complete at least one raid battle. Once this challenge is completed and you have enough candy, the evolve option will unlock.
Follow these steps to evolve Galarian Yamask:
Catch or obtain a Galarian Yamask in Pokémon GO
Set Galarian Yamask as your buddy Pokémon
Complete a raid battle while it remains your buddy
Collect 50 Yamask Candy
Open the Galarian Yamask page in your Pokémon storage
Press the evolve button once the requirement is completed
After completing these steps, Galarian Yamask will evolve into Runerigus.
It is important that Galarian Yamask remains your buddy when the raid is completed so the progress counts toward the evolution.
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Why Galarian Yamask Requires a Raid Battle
The mechanic used to evolve Galarian Yamask Pokémon GO reflects its unusual evolution method in the main Pokémon games. In those games, Galarian Yamask evolves after the player completes a specific challenge involving battle damage and travelling to a special location.
Pokémon GO recreates this concept by requiring players to complete a raid battle while Yamask is their buddy. This adds an extra challenge to the evolution and makes it more memorable than a simple candy based evolution.
Because this requirement is not obvious when players first try to evolve Yamask, many trainers search for help when the evolve option does not appear.
Interested in completing Dynamax Battles? Our Pokémon GO Dynamax Pokémon Guide: All Max Battle Bosses And How To Beat Them – covers everything you need to know to maximise results in battle.
How Much Candy Is Needed to Evolve Galarian Yamask Pokémon GO
To evolve Galarian Yamask Pokémon GO you will need 50 Yamask Candy.
Yamask Candy can be collected by catching Yamask during events or research encounters. Using Pinap Berries while catching Yamask will double the candy reward and help you reach the required amount faster.
You can also transfer duplicate Yamask to Professor Willow to gain additional candy.
Walking Galarian Yamask as your buddy may also generate candy over time while you prepare to complete the raid requirement.
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What Galarian Yamask Evolves Into in Pokémon GO
When you evolve Galarian Yamask Pokémon GO it evolves into Runerigus.
Runerigus is a Ghost and Ground type Pokémon with a unique design based on ancient runes and cursed tablets. Its unusual typing gives it some interesting resistances and battle potential.
Many trainers evolve Galarian Yamask mainly to complete their Pokédex or to collect the full Galarian evolution line.
Because Galarian Yamask does not appear frequently in the wild, evolving one into Runerigus can feel like a rewarding achievement.
Tips for Completing the Raid Requirement

Completing a raid battle is usually a straightforward requirement for most players.
You can join any raid available at a nearby gym, including lower difficulty raids that can be completed alone. Once the raid is finished and Galarian Yamask is still your buddy Pokémon, the requirement will be completed.
Remote Raid Passes can also be used if you want to join a raid without travelling to the gym location.
After completing the raid, the evolve option should immediately become available if you also have enough candy.
Is Runerigus Good in Pokémon GO
Runerigus has a unique Ghost and Ground typing that can make it useful in certain PvP battles. Its defensive stats allow it to survive longer in some matchups, particularly against Electric and Fighting type opponents.
While it is not commonly used in raid battles, Runerigus still has value for players who enjoy collecting unusual Pokémon or experimenting with different battle teams.
Many trainers evolve Galarian Yamask mainly to complete their Pokédex and obtain this distinctive Pokémon.
Evolve Galarian Yamask Pokémon GO
Understanding how to evolve Galarian Yamask Pokémon GO becomes simple once you know about the raid requirement. Instead of evolving with candy alone, Galarian Yamask must complete a raid battle while it is set as your buddy Pokémon. After finishing the raid and collecting 50 Yamask Candy, the evolve option will unlock and Galarian Yamask will evolve into Runerigus.
Although the requirement may initially surprise some players, it adds a unique challenge to the evolution system in Pokémon GO. By setting Yamask as your buddy and completing a raid, you can easily evolve Galarian Yamask Pokémon GO and add Runerigus to your collection.
