The Sea Legend Guide Pokemon Legends Arceus
Image: Nintendo Life / The Pokémon Company

Pokémon Legends: Arceus is the latest adventure in the Pokémon franchise, this time bringing with it a whole new open world, new catching mechanics and more.

While the deep mysteries of Hisui, and which Pokémon you’re going to encounter, are left for you to solve, there are a few quests that you might need a bit of help with — and the Sea Legend side quest is one of them.

The Sea Legend guide Pokémon Legends: Arceus

The Sea Legend is a side quest that was actually first referenced in Pokémon Brilliant Diamond and Shining Pearl. In a book, in Canalave library, the following text can be found:

This book is titled "The Sea's Legend." It's a text that was only recently discovered, and its ancient letters were decoded. Once upon a time in the East Sea, there was a Pokémon known as the prince. A brave human asked Pokémon living in the sea to let them see the prince.
Mantyke, Buizel, and a Qwilfish with huge spikes acknowledged the human's bravery and joined them. Together, they set off in a boat over the sunset-streaked sea, sailing through the ocean gate stretched over the waves. News of this reached the ears of the prince, who went to meet the brave little party at the Seaside Hollow.

As you continue your journey in Pokémon Legends: Arceus, the professor will give you a side quest that references this legend, and little other information. If you’re not keen on firing up your copy of Brilliant Diamond and Shining Pearl to work it out for yourself — or if you don't own that game — have no fear, because you're reading the right guide!

The three Pokémon you need

You’ll need a Mantyke, which is easily catchable in the Cobalt Coastlands, a Buizel, which is easily catchable in the Obsidian Fieldlands, and an Overqwil. In order to get an Overqwil, you’ll need to catch a Quilfish and have it use Barb Barrage 20 times using Strong Style. It’ll evolve after you use it for the 20th time.

Head to the massive horns

After you have those three Pokémon, head to the massive horns in the middle of the sea in the Cobalt Coastlands during the in-game evening. If you’ve done it correctly, you’ll get a brief cutscene indicating that you can now proceed with the quest.

Go to Seaside Hollow

Then head to the small cave to the southwest of Seagrass Haven called Seaside Hollow. Inside, you’ll find Manaphy, and 3 Phionne. You can catch all of them, but be careful, as taking on 4 Pokémon at once can be difficult.

This article is part of our Pokémon Legends: Arceus walkthrough and guide series. You can find every Pokémon in the game using our Complete Hisui Pokédex List And Pokémon Locations guide, or hunt for specific hard-to-catch Pokémon with our individual guides, including Every Alpha Pokémon (with Maps), Every Rare Space-Time Distortion Pokémon, Where To Find Every Unown, Where To Find The Other Starters, Where To Find The Sinnoh Starters, How To Catch Darkrai, How To Catch Shaymin, Where To Find Hisuian Zorua, Where To Find Hisuian Growlithe, Where To Find Hisuian Electrode, How To Get Sneasler, How To Get Wyrdeer, How To Get Alolan Vulpix, How To Get Kleavor, How To Catch Tornadus, Thundurus and Landorus, How To Get Every Eeveelution, How To Catch The New 'Secret' Legendary, and (of course) How To Catch Arceus.

Elsewhere we've got starter guides with answers to simple questions like "How Do You Break Cracked Rocks?" and "How Long Is Pokémon Legends: Arceus?", plus tips on How To Swap Pokémon, How To Turn On Gyro Controls, or where to find specific items and make the most of your resources, including How To Increase Your Bag Size And Carry More Items and Where To Buy Every Evolution Item, Plus A Complete Price List. We also have our Ginkgo Guild Item List And Prices guide and cover How To Get Shiny Pokémon and how to access and complete various side quests and missions, such as The Sea Legend, the Eerie Apparitions In The Night Mission Guide - Maps With Every Wisp Location, and How To Defeat Volo, as well as a 'Snow-White Vulpix In The Snow' Map.

We also have a Ginkgo Guild Item List With Prices and explain How To Change Pokémon Forms, Every New Evolution Method, How To Unlock The Mystery Gift Function, in addition to a regularly updated Full List Of Mystery Gift Codes.

And finally, Where to Buy Pokémon Legends: Arceus on Nintendo Switch, if for some reason you haven't yet picked up the game!