Niantic Announces the Season of Mischief

Submit Feedback or Error

Summer is taking its final bows in the Northern hemisphere, giving way to Autumn and the changes that it brings. The Southern hemisphere is getting ready to bid Winter a farewell as Spring appears. And, of course, the Season of Discovery is seeing its final days, as something far more... mischievous takes center stage. See that big hoop in the sky? Well, it's finally time to add the Pokemon that made it to our collections, as the Season of Mischief begins in Pokemon Go!

The Season of Mischief

Season Start Season End
September 1, 2021 December 1, 2021

Season of Mischief Special Research

We're going in strong with a new Special Research line that will be released in parts, and will introduce Hoopa - Confined forme to players.

We don't have the full list of events yet, but here's what we do know is coming:

Date Event Stage
September 1 Welcome to the Season of Mischief
September 5 Hoopa's Arrival
September 8 ???
September 21 ???
October ? ???
October ? ???
November ? ???
November ? ???

As is revealed above, we don't know a whole lot about the storyline for this season, except for information on the first two parts, the fact that it's 8-parts in total, and the fact that players that complete all of the parts of this season's story will be given access to a special event at season's end!

Welcome to the Season of Mischief

This looks to be a simple research line, as it focuses on Hoopa stealing Professor Willow's glasses. This will be the first part of the new research line, and should introduce Hoopa to Pokemon Go players a bit more than what we've already seen through Go Fest and the resulting Unlocks.

Hoopa's Arrival

This one will be a semi-typical Incense event with a few added bonuses.

  • Each hour, a different 1-2 types will be attracted to Incense.
  • 2x Transfer Candy
  • A free Incense bundle will be available in the shop
  • A collection challenge will be available for the Incense event, rewarding Hoopa candy and a "Pokeball Lift" avatar pose.
  • Special field research will be available that will reward Rare Candy and different types of Pokeballs.
Event Hours (Local TIme) Bossted Type(s)
11:00 a.m. - 12:00 p.m. Psychic
12:00 p.m. - 1:00 p.m. Dark/Ghost
1:00 p.m. - 2:00 p.m. Psychic
2:00 p.m. - 3:00 p.m. Dark/Ghost
3:00 p.m. - 4:00 p.m. Psychic
4:00 p.m. - 5:00 p.m. Dark/Ghost

Psychic Type Spawns

Dark/Ghost Type Spawns

Seasonal Changes

While Hoopa is taking center-stage for this event, it's not alone in the festivities. As with every other season to date, general changes to our game-world are also on their way.

Biome Spawn Changes

This year, we don't just have the normal seasonal changes, we also have changes by biome as well. These appear to be global changes, and the lists below are the ones that we know, but they're definitely not complete.

City Biome

Forrest Biome

Mountain Biome

Water Biome

Hemisphere Spawn Changes

And, of course, with the season comes a new set of hemisphere-based spawns. Note that the Deerling in the Northern and Southern hemispeheres will be Autumn and Spring formes respectively.

Northern Hemisphere

Southern Hemisphere

Other Changes

We have a few other changes to discuss here, as the Season of Mischief will have even more changes.

Boosted Mega Evolutions

The old Mega Boost system is back for the Season of Mischief, and we have at least one that is very note-worthy!

Boosted Month: September

Mega Slowbro is... not a big deal, even given a CP boost. It's not terrible due to the fact that its bulk can provide a fairly long team power boost, but it's definitely nothing outstanding enough to be worth investing in for the month.

Boosted Month: October

Oh boy... Mega Gengar is already one of the absolute strongest Pokemon in the raid scene thanks to its titanic Attack stat and outstanding Ghost Type moveset, so why not make it even stronger? If anything is weak to Ghost this month (and a number of things probably will be. It's October), then this spook is going to be the go-to grinning nuke.

Boosted Month: November

Mega Houndoom is a very overlooked and underrated Mega Evolution. It sports high damage in two good types, and can easily change utility with a simple TM as none of its best moves are Elite. It's a bit frail, but the CP boost should make it a very strong Pokemon that can be useful through the month.

Egg Shake-Up

The egg pool is about to change once again, with a few note-worthy highlights along the way. We aren't going to break it down here as we only have a very bare-bones selection shown, but we will update our Egg page as soon as we have the full list.

New Ditto Disguises

Looking for a Ditto?

Well, now we have nine brand-new Pokemon that it can disguise itself as:

Full Announcement

Click to View

Full Text


The strange events of Pokémon GO Fest 2021 continue in the Season of Mischief! This Season will focus on an adventure featuring Hoopa, the Mischief Pokémon, which you’ll be able to encounter early on in this Season’s Special Research story: Misunderstood Mischief!

When Hoopa summoned Legendary Pokémon to Pokémon GO during Pokémon GO Fest 2021, time and space were distorted. Hoopa has also brought Pokémon originally discovered in the Galar region to Pokémon GO for the first time! Be sure to follow along during the Season to see what else might happen!

The Season of Mischief will run from Wednesday, September 1, 2021, at 10:00 a.m. to Wednesday, December 1, 2021, at 10:00 a.m. local time.


Hoopa is arriving

Beginning September 1, 2021, at 10:00 a.m. local time, you’ll be able to access a season-long Special Research story. Throughout the Season of Mischief, you’ll gain access to different sets of tasks in this Special Research story. For instance, you’ll be able to encounter Confined Hoopa by completing a set of tasks that’ll unlock beginning September 5.

Read on to learn more!

Learn Hoopa’s secrets during the Season!

You’ll be able to access parts of this Season’s Special Research story when certain events begin. The Special Research story will focus on discovering more about Hoopa and the strange occurrences happening throughout the Season, so stay tuned to follow along with the story.

If you complete this Season’s Special Research story, you’ll gain access to a special event at the end of the Season that might have something to do with Hoopa!

Hoopa can’t be transferred to Pokémon HOME for now. For Trainers unable to play during this Season, Confined Hoopa may be available again in the future.


Sep 1

Welcome to the Season of Mischief

Sep 5

Hoopa’s Arrival

Sep 8

Sep 21



9/1 Welcome to the Season of Mischief

Available beginning Wednesday, September 1, 2021, at 10:00 a.m. local time

The Season of Mischief begins! Hoopa has been playing pranks on the team leaders and Professor Willow—it’s taken his glasses?!— and it's up to us to learn more about the Mischief Pokémon. Why is it so mischievous? What else does it have in store for us this Season?

9/5 Hoopa’s Arrival

Available beginning Sunday, September 5, 2021, at 11:00 a.m. local time

Complete the seasonal Special Research tasks for an opportunity to catch Hoopa! On Sunday, September 5, 2021, from 11:00 a.m. to 5:00 p.m. local time, various strange phenomena will be happening all around the world —maybe this has something to do with Hoopa?!

The following types of Pokémon will be appearing in the wild and attracted to Incense at the listed local times.

11:00 AM - 12:00 PM

12:00 PM - 1:00 PM

1:00 PM - 2:00 PM

2:00 PM - 3:00 PM

3:00 PM - 4:00 PM

4:00 PM - 5:00 PM

Available Pokémon include the following.

Psychic-type hours

and more

Ghost-type and Dark-type hours

and more

Other event bonuses

  • There will be a Collection Challenge available featuring Pokémon attracted to Incense during the event hours. The Collection Challenge will reward Hoopa Candy and the Poké Ball Lift avatar pose!
  • You’ll earn twice the Candy for transferring Pokémon.
  • A free bundle containing an Incense will be available in the shop.
  • Complete event-exclusive Field Research tasks to earn Rare Candies and a variety of Poké Ball types!

What else is happening during the Season of Mischief?

Mischief abound!

Throughout the Season, you can look forward to mischief! What strange occurrences will be happening in Pokémon GO? You’ll have to wait and see!

Hoopa ring

Different Pokémon will be appearing in the wild!

As the seasons change, different Pokémon will be appearing in different areas across the world!

and more

and more

and more

and more

Northern Hemisphere

and more

Southern Hemisphere

and more

Different Pokémon will be hatching from Eggs!

The following Pokémon will be hatching from Eggs this Season.

and more

and more

and more

Eggs earned from Adventure Sync Rewards

and more

and more

Mega Evolution bonuses!

During each month of the Season of Mischief, a different Pokémon will receive a CP boost when Mega Evolved.




Ditto transformations

There seems to be a change in the species of Pokemon that Ditto is transforming into in the wild. There is now a chance that the following Pokémon will instead be a Ditto when caught!

There’s much to look forward to this Season as we journey with Hoopa and learn all about what makes the Mischief Pokémon tick.

Let’s GO!

Please be aware of your surroundings and follow guidelines from local health authorities when playing Pokémon GO. Upcoming events are subject to change. Be sure to follow us on social media, opt in to receiving push notifications, and subscribe to our emails to stay updated. For the latest on in-game events and feature updates, be sure to check this help center article.

—The Pokémon GO team

Enjoyed the article?
Consider supporting GamePress and the author of this article by joining GamePress Boost!

About the Author(s)

Gamepress writer with a focus on theorycrafting and gameplay optimization with a background in business management and freelance writing.  A bit of a hermit, but also an outdoors enthusiast who loves cycling and hiking. Long-time Gamepress fan who is very proud to be a part of the team.