Watch Space Squad: Space Sheriff Gavan vs. Tokusou Sentai Dekaranger (2017) : Full Movie Online Free Space Sheriff Gavan vs Tokusou Sentai Dekaranger features the return of Yuma Ishigaki from 2012’s Space Sheriff Gavan: The Movie and the 2015 Space Sheriff Next Generation films. The first installment will join the two police themed heroes as they face a massive space crime organization.