"...Biff!"
The stone flashed for a second and Jon came running into the hall after her, but it wasn't the Jon she knew! It was a beautiful girl with long, wavy blond hair, a killer figure with long legs, a round butt, and large, bouncing breasts, and a gorgeous face with big, expressive eyes, a cute little nose, and pouty lips. She was wearing a short skirt and a clingy top with a neckline that revealed a generous amount of cleavage.
"Kaaaryyyyn! What did you wish for," she asked pleadingly.
Karyn was shocked at first... how had this happened? But then she realized that one way for the wish to come true wasn't to change Biff's sexual orientation, but to change Jon into Biff's ideal girlfriend! "Umm, Jon, do you notice anything different," Karyn asked hesitantly.
The girl grabbed her ample chest, looked down at herself, felt her skirt, and looked up again. "No, what did you do? Am I dressed differently or something?"
"Has, umm, Biff been hitting on you lately?"
"Like, sure Karyn, you know he's been after me ever since my chest developed... why? What did you do? Like, gimme the stone back Karyn, I haveta know!" The transformed Jon snatched the stone from Karyn's hand.
"I wish I knew, like, what are the results of Karyn's wish," Jon said quickly. Her large eyes opened in surprise. "Ohmygahd, Karyn, you turned me into a sexy bimbo of a girl that Biff has the hots for!"
"I didn't think that would happen Jon!" Karyn replied.
"But, like, I totally remember growing up with you as my best girlfriend, we go shopping together all the time, trade clothes, do each others hair... Like, I remember all the times you'd helped me with my math, and I helped you with fashion tips and how to kiss boys. We had pillow fights at our girls only sleepovers! But, because of that last wish, I now also remember my whole life as a boy, which is, like, weirding me out!"
Karyn wasn't sure what to do. "Should we try to fix this, Jon? Make another wish?"
"Like, I dunno Karyn! You didn't wish me to be a sexy girl, so I guess we could, but I really don't want Biff chasing me as a guy, eeeww! Why'd you wish for that Karyn? He's a big dumb jerk."