SD Gundam Gaiden: Knight Gundam Monogatari - Ooinaru Isan

Sudha Doaka World is a different world, a different time, a world where humans and MS people live together.

One day, in this peaceful world, an evil person with powerful forces appeared.
He calls himself Satan Gundam and declares that he will destroy humans and create a world of only MS.

Satan Gundam's power reached the distant frontier kingdoms.
The king chose a knight with the name of a legendary hero and ordered him to protect the country from Satan Gundam.

His name is Knight Gundam. Now begins his long journey...