Sister's wedding

Gerald and his sister, Eve, discovered the Medallion of Zulu the night before her wedding. After examining it for a while, Gerald accidentally transformed himself into Eve's double, and Eve accientally transformed herself into the family dog! After the incident, Gerald discovered a note saying that it wouldn't work again for twelve hours. He breathed a sigh of relief knowing that they'd have time to switch back to themselves before wedding preparations began. When he woke up the next morning, however, Eve (in the dog's body) was nowhere to be found. His mom seemed confused; she said that the dog was going to be in a kennel until after the honeymoon, when Eve's husband would pick it up to stay with the newlywed couple. Not realizing that it was Gerald in Eve's body, she couldn't understand why he didn't know this. Now Gerald was forced to go through the wedding and honeymoon as his sister until they could swap back to themselves in a week...