SD Gundam Side Story

SD Gundam Gaiden is an OVA from the SD Gundam series, a sub-franchise of the Gundam anime franchise released in 1990.

Plot
The story is set in the mystical land of Lacroa, where humans and robot knights live together. The main character is Knight Gundam, a noble warrior with no memory of his past. Knight Gundam clashes many times with the evil Satan Gundam. Knight Gundam ultimately learns that his amnesia is due to himself and Satan Gundam originally having been a single Gundam before splitting in two.