DS game case doubles as a DS games case

I’m not sure whether I should call this brilliant or useless, but this DS game case actually holds three DS games plus a GBA game. The cover art for the Hyper Carrying Case has some familiar mascots. Doraemon is in the center and Rockman of the Stars is to the right of him. While this looks like a bootleg it isn’t, Shogakukan is selling the Hyper Carrying Case in Japan for 480 yen ($4) a piece.