Pokemon Return to the Deep

Its another adventure made-up by Stardustdragon123 that takes place right after the battle with Karda .

Plot
The story begins right at the moment Kardas was defeated when May begins to complete her final task with the Mask of Life. Just as the group are about to exit the chamber, Kardas unleashes one final blast at May knocking the Mask of Life out of her hands before the dragon dies for good. Ash and the others sets chase after the Mask as once again it has a mind of its own heading for the bay. Moving too fast to be recaptured the Mask plunges into the ocean sinking fast. Misty dives after it with Starmie but the immense pressure proves too much for her and almost drowns when a stranger from the deep with the efforts of Manaphy just saves her. The stranger says a few last words saying to help the city under the ocean directly beneath Voya Nui before dying. Meanwhile at the bottom of the ocean futher than where Misty got to, the Mask lands in a seaweed field. A person called Deckar claims the Mask as he has been waiting to use the Mask to become ruler of Mahri Nui, city of the deep.