This quest is based on a book called The Sea’s Legend present in the Canalave City’s library in Pokémon Brilliant Diamond and Shining Pearl. It involves catching different Pokemon while solving various mysteries in the game.
Also, this is the only way to catch Phione and Manaphy in Pokemon Legends Arceus, so make sure to not miss this chance.
Pokemon Legends Arceus - The Sea's Legend
The first thing that you need to do is catch three Pokemon at Cobalt Coastlands, including Buizel, Mantyke, and Overqwil, in order to start The Sea's Legend quest. Once you do this, add them to your party and head towards the Coastlands Camp, where you can rest until the night.
Once it gets dark, search for two big stones on the right side of the camp. Go through them through Basculegion, and you will hear a noise, and along with this, a text box will pop up saying, "You heard something that sounded like a cry and a boulder sitting in the distance".
After that, go to the Seaside Hollow and go inside the cave where three Phione and one Manaphy.
Start the battle against them using two Pokemon to catch them and then go to Professor Laventon to complete the quest. Upon completing the quest, you will get three Comet Shards as rewards.
- Read more: Pokémon Legends Arceus – What are Research Tasks and how to earn Research Points through them
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Featured image courtesy of Nintendo/The Pokémon Company.