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Pokémon Go What Lies Behind the Mask quest tasks and rewards

What secrets does Yamask hide?

What Lies Behind the Mask is a special research quest in Pokémon Go themed around the ghost-type Pokémon, Yamask.

Following a tradition which began with A Spooky Message and continued with A Spooky Message Unmasked, What Lies Behind the Mask was released as part of the 2021 Halloween event.

Below you'll find every What Lies Behind the Mask quest task and reward, which will help you complete this very spooky Pokémon Go quest.

On this page:

Battling and catching the latest Pokémon Go legendary encounter, Tapu Fini.

'What Lies Behind the Mask' quest steps in Pokémon Go

Below you'll find every step and reward for the What Lies Behind the Mask special research quest in Pokémon Go.

Since it's a special research quest, What Lies Behind the Mask doesn't have a deadline. Instead, you're free to complete this quest at your own pace without having to worry about it disappearing at a specific time.

You will find spoilers down below, so, if you'd prefer to remain surprised, we recommend skipping this section!

Thank you to Amiibofan101 from reddit for the help with this information!

'What Lies Behind the Mask' Step 1 of 4

  • Catch 40 Ghost-type Pokémon - 400 Stardust
  • Transfer 9 Pokémon - Duskull encounter
  • Make 49 Nice Throws - Nine Ultra Balls

Rewards: 4000 XP, nine Nanab Berries and Yamask encounter

'What Lies Behind the Mask' Step 2 of 4

  • Catch 40 Ghost-type Pokémon - Pikachu encounter
  • Make 9 Curveball Throws - 490 Stardust
  • Use 49 Berries to help catch Pokémon - Banette encounter

Rewards: 4000 XP, nine Razz Berries and a Galarian Yamask encounter

'What Lies Behind the Mask' Step 3 of 4

  • Catch 40 Ghost-type Pokémon - 400 Stardust
  • Catch 9 different species of Ghost-type Pokémon - Alolan Marowak encounter
  • Make 49 Great Throws - 49 PokéBalls

Rewards: 4000 XP, 9 Pinap Berries and a Galarian Yamask encounter

'What Lies Behind the Mask' Step 4 of 4

  • Claim reward - 49 XP
  • Claim reward - 490 XP
  • Claim reward - 4900 XP

Rewards:4900 Stardust and 13 Yamask candy


New to the game is a long overdue Mega Evolution update, which has arrived alongside the A Mega Moment research. May 2022 is closing with the Alola to Alola event and special research quest, which has four different sets of challenges for you to choose from. Currently both the Ultra League and Element Cup are running in the Go Battle League. Elsewhere, we've recently seen the release of more Gen 7 Pokémon as part of the Season of Alola. The first details surrounding Go Fest 2022 have also been announced, including the event date.


Tips for completing 'What Lies Behind the Mask' in Pokémon Go

Here are some tips which will help you complete What Lies Behind the Mask in Pokémon Go:

  • We recommend completing this research quest during the Halloween event, because it will make it easier to complete the ghost-type related task, because they'll be appearing more frequently throughout the event.
  • It's a good idea to stock pile berries before completing the second stage of this quest, because you need quite a few to complete it.
  • If you're having trouble achieving all the great throws for the third stage, try focusing on Pokémon which have large catch radiuses like Wailmer.

How 'What Lies Behind the Mask' works in Pokémon Go

Research quests - specific tasks which reward players with a variety of items - were originally released in March 2018 and are divided into four different categories: branching, field, timed and special.

What Lies Behind the Mask was released on Friday, 15th October as part of the Halloween 2021 celebrations and, since it's a special research quest, has no deadline. This means that, once you've collected the quest, you can complete it at your pleasure.

This quest is themed around the ghost-type, Yamask, which was originally a human being. Due to its transformation, Yamask actually retains the memories of its human life and the mask it holds resembles its face from this time. If someone were to wear this mask, they would grant Yamask the ability to possess their body.

What Lies Behind the Mask is constructed out of four quest steps, with each step containing three individual challenges. You'll be rewarded for every challenge and overall step you complete until the quest is finished!

Good luck completing What Lies Behind the Mask in Pokémon Go!

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About the Author

Lottie Lynn avatar

Lottie Lynn

Guides Editor

Lottie Lynn is Eurogamer's Guides Editor. She likes exploring new games and still has nightmares about the moon from Majora's Mask.

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