Sorry Robot-san — The Tears that Vanished in the Desert

Gohan falls into a hole in the desert and discovers a robot buried in sand in an ancient underground ruin. The robot tells him not to disturb its sleep, but Gohan, reluctantly, wakes it up again and again. As the robot looks after Gohan, it begins to get along with him. 

The Saiyan, Strongest Warriors in the Universe, Awaken!

Vegeta and Nappa, two Saiyans heading to Earth, plan to plunder Planet Arlia on the way. However, the once fertile planet Arlia has become a ruined planet ruled by a dictator. The two are obediently taken to the castle, but Nappa wipes out the soldiers and easily defeats the ultimate monster weapon.