Unlike Mario Kart: Super Circuit or Mario Kart 7, Mario Kart Arcade GP and its sequel are huge freakin' machines, weighing hundreds of pounds (they are not portable...). On top of that, they cost thousands of dollars. Most Mario Kart fans will not be able to afford their own arcade game. By owning a Mario Card though, there's no need to buy one. Saving all the cups and unlockables you've obtained can be done with this special card. After all, who wants to play Mario Kart and not get ★★★ ranking on every cup? (People who don't take gaming seriously, that's who.)