Cobalt Island

Cobalt Island is a location that appears in Hey You, Pikachu!. It appears to be located in the Kanto region and is located a little distance away from Cobalt Coast.

Summary
Cobalt Island serves as the main setting for "The Treasure Hunt" activities. However, in order to unlock Cobalt Island, the player and Pikachu must have broken open the pinata three times during "The Pinata Party" event. After doing so, a Lapras will agree to take them to Cobalt Island where many treasures lurk.

Cobalt Island is bascially a small island that contains many treasures buried underground. The player must tell Pikachu to dig one up when they are near one. Afterwards, the treasure chest can be opened with a certain command such as Thunderbolt or Thunder. The treasure chest will then open and Pikachu will give then give the prize to the player. It should be noted that, during Part 2, there is a large cannon at the top of a cliff. Making the cannon go off will cause all of the other treasures to come up to the surface making opening them quicker before sunset.