I have created some bulk storage Gridfinity boxes that fit Gameboy and Gameboy Colour cartridges.

There is various sizes if you have a lot of switch games but for reference the smallest 3x2x6 box will hold around 16 games and the largest 6x6x6 will hold around 96 games. 6x6x6 is also the largest you can print on a Bambu X1 or P1 printer.

These boxes are also fully stackable.