Jon blacked out from a bright flash of light generated by the stone. When he woke up he saw that his room was different it was Zoe's room. But that wasn't all that was different when he looked in the mirror. He was Zoe
But the wish began to take effect. Jon's hair turned from black to red, her skin became less white, her clothes changing completely to a red tank and denim short shorts. The stockings she wore disappeared. The walls of the room changed from black to red and various make-up. She wasn't a cheerleader but not a nerd either...right in the middle
"Zoe, dinner's ready" Her mom said from downstairs "Tell Jon to come out of his room"
Jon as Zoe called downstairs and said "Okay mom"
Apparently they hadn't just swapped personalitys but bodies as well