Game Boy Cartridge KiCAD Footprint by Martin Refseth (HDR)
HDR intended to do this a while back, but here are a bunch of Game Boy related Footprints and Symbols for KiCad, including ready to use cartridge footprints and a bunch of aesthetic footprints (Like date indicators) to make carts look pretty :)
This Game Boy Libraries for Kicad 6.0.6 and above, interested? Just visit the link below for more info ^^