Gen 2 is finally here and with it come not just new Pokémon like Politoed and Slowking, but new items like the King's Rock, too.

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That, in turn, means new methods for evolution: the King's Rock was used for evolving Poliwhirl and Slowpoke in the main Pokémon games by having them hold the item when being traded - a mechanic that's not in Pokémon Go at all as things stand.

So with that in mind, how do you evolve Poliwhirl into Politoed, and evolve Slowpoke into Slowking, and likewise how do you get the King's Rock in Pokémon Go?

The answers to all that can be found below, but while you're here, it's worth noting that there are several other new, special items which work in precisely the same way: the Metal Coat for Steelix and Scizor, the Dragon Scale for Kingdra, the Sun Stone for Bellossom and Sunflora, and the Up-Grade for Porygon2.

How to evolve Poliwhirl into Politoed in Pokémon Go

Poliwhirl, in the main Pokémon series of games, evolves into Politoed in a little more long-winded manner than in Pokémon Go. The original method involves not only finding and using the King's Rock, but getting yourself a trading partner, so that Poliwhirl can hold it and be traded in order to evolve.

Here in Pokémon Go, it's far easier: simply find yourself a King's Rock and use both that, and some Candy like usual, to evolve it into Politoed from the same in-game menu you'd use to evolve a Pokémon normally.

  • Poliwhirl to Politoed Evolution cost - 1 King's Rock and 100 Poliwag Candy.

How to evolve Slowpoke into Slowking in Pokémon Go

Evolving Slowpoke into Slowking works in much the same way as evolving your Poliwhirl into a Politoed.

Like the evolution chain above, Slowking comes as a branching evolution from Slowpoke, acting as an alternative to Slowbro. Interestingly, as you'll see in our best Pokémon in Pokémon Go listings, both Slowbro and Slowking have identical stats, meaning the choice to evolve for one or the other is purely down to your personal preference - and for completing your Pokédex, of course.

Again, as above, to evolve your Slowpoke into a Slowking simply use your stored up Candy, and a King's Rock, to evolve it via the usual in-game menus.

  • Slowpoke to Slowking Evolution cost - 1 King's Rock and 50 Slowpoke Candy.

Want more help with Pokémon Go? As well as our Pokémon Go tips, tricks and guides page, you can look up the Gen 2 Pokédex on how to catch the most recent creatures, using Special Items such as the Dragon Scale and other methods. We also explain big the Gym rework update, Raids, Raid Battles, and Raid Bosses, how to get Legendary Pokémon, and promo codes, and there's also info on changes to how to get PokéCoins, Eevee evolutions, Egg hatching distances, the tier list and best Pokémon, the best moves and movesets and Buddy distances. Plus, you can read about the Pokémon Go Plus accessory works, and even our XP chart.

How to get the King's Rock in Pokémon Go

The King's Rock in Pokémon Go is found in much the same way as several other items, from originals like Pokémon Eggs to fellow new additions like the Metal Coat or Dragon Scale: from Pokéstops.

Fortunately, there is some strategy here after all! A special evolution item will drop on the seventh day of your PokéStop Daily Bonus streak. There's no guaranteeing which evolution item you'll get, but with only five in the game at least you hopefully shouldn't have to wait too long to get a hold of all the items you need.

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About the author

Chris Tapsell

Chris Tapsell

Guides Writer

Chris Tapsell is Eurogamer's Guides Writer, its newest Chris, and a keen explorer of the dark arts of gaming, from League of Legends to the murky world of competitive Pokémon.

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