He-Man and the Masters of the Universe (1983)

S2E51 Here, There, Skeletors Everywhere

Man-At-Arms is experimenting with a new duplicating device designed to replicate any solid item. Unfortunately, the machine is still in development, resulting in copies that are only half the size of the originals. Seizing the opportunity, Skeletor steals the device and begins producing an army of tiny Skeletors to carry out his orders. Soon, the palace is inundated with these pint-sized minions, creating chaos and confusion for everyone inside!