Ever wondered, how the power ups ended up in an island and how do you catch those Pokemon’s in the water? There is actually a Secret Techniques that your Pikachu / Eevee have to learn, this is by surfing or swimming in the Ocean. The name of the teachnique is Sea Skim.
You can learn this technique as you progress in the Pokemon Let’s Go, after you reach the Fuchsia City, where the Pokemon Go park is located. There is some guy inside the Go park with the Pokemon Lapros that you can asked to teach your Pikachu / Eevee those technique.
How to Learn Sea Skim
To learn, Sea Skim. You need to go to Fuschia City and go inside the Go Park.
In the left corner, look and find for a guy with a surf board standing infront of a pool talking to a Legendary Pokemon Lapros.
Talk to the guy, and he will teach your Pikachu / Eevee the Sea Skim Secret Technique.
To surf, just go near any water. Then it should prompt that you want to use the Secret Technique Sea Skim. Just press Yes to proceed.
After that, you could now swim and surf on any waters in the game and catch more water type Pokemon.
 You may also watch our walk through video guides.