Show HN: Game Boy Release Timelines
gameboyessentials.com
I spent way too long making a visual list of all Game Boy releases to help with my writing. The whole thing is all HTML and CSS, no scripting anywhere.
gameboyessentials.com
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.