Watch Scoob! (2020) HD Full Movie Free on SolarMovie. Watch Scoob! (2020) online free. 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.