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This week in Pokémon Go (17th to 23rd August): Debuts aplenty

The upcoming schedule and what to focus on - including the Ultra Unlock: Water Festival - plus news from the week.

Arrokuda, Mega Starmie, and Cramorant in front of a polygonal shape and textured background.
Arrokuda, Mega Starmie, and Cramorant. Credit: One More Catch (via Scopely Explore / The Pokémon Company)
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Welcome to the latest One More Catch weekly newsletter, offering you a guide to the days ahead in Pokémon Go.

For completionists, a busy week awaits. There's debuts of all kinds - unreleased Pokémon, a shiny, a Mega Evolution and Dynamax addition(s) - rolling out across multiple events throughout the week. There's a lot to keep track of, basically - which sounds like the perfect job for a weekly schedule newsletter.

So here's a snapshot of everything coming to Pokémon Go in the days ahead, the biggest opportunities available, and a roundup of Pokémon news and site updates you may have missed.

Update (17th August): This article previously said Mega Starmie Raid Day started at 2pm, when it is the earlier time of 11am - apologies for the error.

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Events in Pokémon Go this week (17th to 23rd August)

All times are at your local time, unless otherwise stated.

Date

New events and updates

Regular events and raids

Monday 17th

Choose Your Path: Venom and Vines ends (8pm)

• Final chance to make use of chosen bonus and complete challenges


Max Monday (Dynamax Magikarp debut)

Tuesday 18th

Ultra Unlock: Water Festival (10am until Monday, 24th August at 8pm)

• Arrokuda, Barraskewda, and Cramorant debut

• New Go Pass with 2x Catch Candy and ½ Egg Hatch Distance bonuses, Deluxe track features a Starmie backpack

• New wild encounters, including increased Wiglett chance (in its biome)

• Tatsugiri forms in raids

• Catch bonuses increasing throughout the week, starting with 2x XP and 3x Stardust

Showcase Tuesday

~

Go Battle League refresh (9pm UK / 4pm EST / 1pm PST)

• Great League

• Scroll Cup: Great League Edition

Wednesday 19th

Wednesday raid refresh

• Five-star: Lunala (shiny debut)

• Mega Raids: Mega Swampert


Raid Hour (6pm to 7pm)

• Five-star: Lunala

Thursday 20th

Water Festival bonuses change (10am)

• Increases to 3x XP and 4x Stardust Catch bonus

Go Battle Thursday

~

Spotlight Hour (6pm to 7pm)

• Magikarp

• 2x Catch XP

Friday 21st

N/A

Friendship Friday

Saturday 22nd

Ultra Unlock: Starmie Mega Raid Day (11am to 5pm)

• Mega Starmie appearing in Super Mega Raids (new debut)

• Timed Research with a Scizor encounter

• £4.99 / $4.99 ticket with 14 Raid Passes, and increased Rare Candy XL chance + additional 5,000 XP / Stardust from Super Mega Raids

~

Water Festival bonuses change (10am)

• Increases to 4x XP and 5x Stardust Catch bonus

N/A

Sunday 23rd

N/A

Scenic Sunday


What to know about this week

Here's what jumps out to me in the days ahead:

Many new debuts

There are a whopping six* debuts this week:

* Seven, if you want to include Dynamax Gyarados

Arrokuda, evolution Barraskewda, and Cramorant are the big draw on Tuesday. None of these will appear in the wild, with Arrokuda featuring in Field Research, the 'Water Festival' Go Pass, and from Rainy Lure Modules.

Cramorant, meanwhile, will be found in Eggs, the 'Water Festival' Go Pass, and Go Battle League rewards. Cramorant has several forms where it's gulping down other Pokémon (including poor old Pikachu) which occur during battle, meaning there's just one variant to actually catch.

In terms of getting everything else that's new, it's what you'd expect from their respective events. And remember, if you want an easier way to encounter Lunala en masse for the shiny, it'll appear during the Wednesday night raid hour.

Is Mega Starmie any good?

Legends: Z-A's best new Mega - a Starmie that sprouts a pair of legs - debuts in Pokémon Go on Saturday (11am to 5pm), but it's unfortunately not really up to snuff. It's in DialgaDex's B-tier list of Water-type attackers, and though it fares much better as a Psychic-type in the S-tier, that's a packed field, ranking 28th overall (or 11th if you discount other Megas such as Mega Mewtwo, and Shadows).

Mega Starmie in front of a polygonal shape and textured background.
Mega Starmie. Credit: One More Catch (via Scopely Explore / The Pokémon Company)

So it's decent, but nothing to worry about competitively. That said, I'll be wanting one ASAP so it can stomp around as my Buddy on the map screen.

Need Magikarp Candy?

Magikarp is the original Gen 1 Pokémon with a demanding evolution requirement (needing 400 Candy to evolve into Gyarados), and while long-time players will likely have plenty in the bank to evolve a new Dynamax version, new or lapsed players can take advantage of the Thursday Spotlight Hour where Magikarp will be the focus - alongside a 2x Catch XP bonus.

Tatsugiri is back

Tatsugiri, with its three regional forms, returns in raids for Tuesday's 'Water Festival' event. The locations are as follows, and though it's easily soloable, if you have friends in different continents, be sure to send them an invite so they can collect the set:

And no, it's not shiny - yet. My money would on a debut during the 2027 'Water Festival' event, but it could well be longer.


What's new in Pokémon and Pokémon Go?

Here's a roundup of stories from the week:

Free Mewtwo ’10th Anniversary’ Timed Research in Pokémon Go
Scopely Explore surprise drops a free Mewtwo and Master Ball to make up for last month’s New York event.
Pokémon GO Fest 2026: Mega Finale
You’ll soon be able to transfer Safari Ball-caught Pokémon to Pokémon Home
Alongside news that Pokémon Bank will end service in early 2027.
Aniimo release date set for September
With PlayStation and Xbox seeing store-exclusive pre-order items.

One More Catch notes

The big behind-the-scenes news is One More Catch has a new ad partner, helping the website display ads more neatly within the site's layout. Thanks for your patience over the last few weeks while this was put in place; there's been many adjustments to help ads sit prominently on a given page (helping make the publication more financially sustainable) while ensuring they get in the way of reading.

Of course, if you have any issues or thoughts, please drop me a line. (And though I think I've struck a good balance, if you want to remove ads entirely, a site subscription is always available.)


That's the end of this week's newsletter! As usual, we wrap with a reminder that you can subscribe to One More Catch for bonus articles, extra site functionality such as ad-free browsing, and as a way to show your support for the newsletter and site in general.

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Thanks to One More Catch's Great and Ultra Supporters: An Nguyen, Ari Notis, Christopher Munoz, Ezri Munro, Jessica Orr, Jon Hicks, Kyle Keller, and Misty.
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Hope you have a great week!

Matthew Reynolds

Matthew Reynolds

Matthew Reynolds is founder and editor of One More Catch, and has covered Pokémon Go since day one. An award-winning games journalist based in the UK, he has written for Polygon, Eurogamer, Digital Spy, The Guardian, and Retro Gamer magazine.

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