Starmie

Description
This Pokemon, also known as "Gem of the Sea" is said to use the seven-colored core of its body to send electric waves into outer space. Starmie swims through water by spinning its star-shaped body as if it were a propeller on a ship. People in ancient times imagined that Starmie were transformed from the reflections of stars that twinkled on gentle waves at night.

Staryu ---> Water Stone---> Starmie