Misty looked up as a familiar face approached the Cape. In fact, perhaps a little too familiar. Sure, he was older and just as cute as before, but it was unmistakably Ash. He stopped dead as he saw her, and she called him over.
As he ran to the edge of the cape, he said quietly, 'Misty? What happened to you?'
She smiled sneakily. 'Oh, I'm just out practicing for a show. But I found this,' she said, holding the Water Stone up. 'Here, you might want it.'
He smiled and virtually snatched it from her hands, but before he could say a word, it released a glowing light and knocked him to the ground. 'Wh-wha-' he started, but then wriggled his back and found he couldn't move his legs. In fact, the whole bottom of his body seemed to be melting together, his clothes vanishing as a fish tail formed.
He squeaked as the changes began to make him female, making Misty giggle as he whimpered confusedly. Her hair flowed down to her hips, and her remaining clothes were replaced with a shell bikini under which her boobs began to bulge. Ashley could barely speak as her face twitched and convulsed into a more feminine shape.
Shocked, Ashley flopped herself into the water and looked confusedly at Misty, who swam up to her and kissed her on the cheek before twirling her own tail around Ashley's. 'Ssh. Come on, I think you're gonna like being a mermaid,' she whispered. Ashley looked bewildered at her, until they began to kiss- at which point she suddenly began to feel really, really good...