Destroy All Planets (1968)

Directed by Noriaki Yuasa, this Japanese sci-fi film follows the young heroes Gamera, a giant flying turtle, and a group of Earth children who form an unlikely alliance to thwart an alien invasion. The nefarious aliens, known as the Space Women, attempt to conquer Earth using mind control devices on the planet's children. But when Gamera steps in to protect the kids, an epic battle ensues between the colossal turtle and the aliens' monstrous creatures.