Scoob! 
 IMDb
Scooby and the gang face their most challenging mystery ever: a plot to unleash the ghost dog Cerber.. Scooby and the gang face their most challenging mystery ever: a plot to unleash the ghost dog Cerberus upon the world. As they race to stop this dogpocalypse, the gang discovers that Scooby has an epic destiny greater than anyone imagined. (IMDB) More >> << Less
Cast
Mark Wahlberg, Zac Efron, Amanda Seyfried