I think the above is saying they made the 3ds game carts a different shape so you couldn’t fit the 3ds carts in a DS. But you could fit a DS cart in a 3ds.
Same with Gameboy -> Gameboy Color, and Gameboy + Gameboy Color -> Gameboy Advanced. Nintendo has a better history than most of supporting backwards compatibility
I think the above is saying they made the 3ds game carts a different shape so you couldn’t fit the 3ds carts in a DS. But you could fit a DS cart in a 3ds.
Same with Gameboy -> Gameboy Color, and Gameboy + Gameboy Color -> Gameboy Advanced. Nintendo has a better history than most of supporting backwards compatibility
Let’s not forget the real pro gamer mover
GBA -> DS