Not to nitpick, but your note about Motocross Maniacs on the North American timeline should be updated.
It is correct that it's Konami's first GB title, but that only applies in Japan. In the US, Castlevania: The Adventure technically releases first with Motocross Maniacs releasing afterward.
It is correct that it's Konami's first GB title, but that only applies in Japan. In the US, Castlevania: The Adventure technically releases first with Motocross Maniacs releasing afterward.
You have this correct on the Japanese timeline.