What show that featured the actors who acted in "Sonny with a Chance", besides Demi Lovato did Zack Martin (played by Dylan Sprouse) have a cross-over episode with? 
Zack Martin (Suite Life):  Zack also appeared on cross-over episodes of other Disney Channel series, such as "That's So Raven", "Wizards of Waverly Place", "Hannah Montana", "I'm in the Band", "So Random! So Random!:  The series features the actors who acted in "Sonny with a Chance", besides Lovato: Tiffany Thornton, Sterling Knight, Brandon Mychal Smith, Doug Brochu, and Allisyn Ashley Arm along with other featured actors who recur in the series.
i don't know