[[WMG: Kouji and Shizuru got together later and started a family of badasses]]
All their descedants were sharing his [[HotBlooded Hot Blood]] and [[LargeHam Haminess]] and her [[{{Badass}} Badassery]] and CatchPhrase. Last member of their dynasty was [[TengenToppaGurrenLagann Kamina]].
* Another famous member of said dynasty was [[WebVideo/AtopTheFourthWall Crazy Steve]] also known as [[ComicBook/AllStarBatmanAndRobinTheBoyWonder Goddamn Batman!]]

[[WMG: Kouji's parents somehow knows Mazinger team]]
That's why he's named after [[MazingerZ Kouji Kabuto]] and [[GreatMazinger Tetsuya Tsurugi]] - his parents were their friends.

[[WMG: Kouji's parents are pair of {{Otaku}} and GoNagai fans]]
If NicolasCage could name his son [[SuperMan Kal-El]] then I bet two okatu could name their child Kouji Tetsuya.

[[WMG: Show takes place in one Universe with GaoGaiGar]]
In episode 2 Go is reading about wedding of "Gai and Mikoto" in the newspaper. While it wasn't ever stated in the show, it's possible that Gai and Mikoto could get married between the events of GaoGaiGar and FINAL [[spoiler: After becoming Evolouders]]. And wedding of guy who defeated Zonder Empire clearly would make it to the front page.

[[WMG: Godannar is the distant past of GurrenLagann!]]
The Mimetic Beasts and then the Insania Virus were sent by the Anti-Spirals. When THAT didn't work, they decided to take a direct approach.
* Further, Shizuru and Kouji could be the ancestors of Kamina while Go and Anna could be the ancestors of Yoko.