Pokemon Legends: Arceus presents a new look into the beloved Sinnoh region of times past, once named Hisui. With many mysteries to uncover and adventures to enjoy, your journey will take you to different places, and face you against various mythical and legendary pokemon.

Related: Pokemon Legends: Arceus - Which Starter Should You Pick?One of the many legendaries roaming around Hisui is Manaphy, the prince of the sea. However, before we can find and catch this pokemon, we must first begin by reading a book... in Pokemon Brilliant Diamond or Shining Pearl.

How To Unlock "The Sea's Legend" Request

Shortly after finishing the Coronet Highlands part of the main story, you will spot this request on the board. Once you claim it, Professor Laventon will tell you about having spotted a mysterious water pokemon in the Cobalt Coastland, and since he has no clue about the kind of pokemon it was, he'll call Warden Iscan, which will tell you an old legend about a sea prince and how to possibly find it, thus beginning Request #66, "The Sea's Legend".

While you won't have access to the book in this game, you may have seen the text in it already if you explored the Canalave Library in Pokemon Brilliant Diamond or Shining Pearl. This book, also named "The Sea's Legend", narrates the story of a group of pokemon in their search for this sea prince, so keep the details in it on your mind, because is in that story where it lies the key for your success.

To find Manaphy, you must have a Buizel, Hisuian Qwilfish, and Mantyke in your party, and ride a Basculegion through the stone arch at the eastern part of the Cobalt Coastlands. Doing so will trigger a message telling you that the Seaside Hollow cave is now open, and you must go there for the next step. Once you enter you will spot a Manaphy surrounded by three Phione, all the four protected by a windy shield, moving quickly around the cave. Manaphy will spawn at level 50 and the three Phione will be level 33, so be careful to not one-shot any of them, which at this point may be fairly easy to do. Throw a pokeball at them to disrupt their shields, and once they're vulnerable you can send a pokemon to begin a battle, and hopefully catch them.

Next: Pokemon Legends: Arceus - Complete Guide