Satan Gundam

The feared Demon King who is said to have descended upon the Saddrac World in a flash of lightning.

Rarely making an appearance in person, he controls the monsters and knights that comprise the Zeon family from Zeon Black Castle, where he spreads his evil influence throughout the peaceful Lacroa Kingdom.

He attacks by concentrating magical energy into his Demon King Staff, which enables him to launch attacks from a distance.

He is actually the evil half of the Musha Gundam Mk-III. Split in half after his arrival from another world, he is an opposing force to the Knight Gundam.

(Source: SD Gundam G Generation Eternal)