"Hiper" refers to something bigger than "Super", and it's common to respect that convention. Wikipedia defines both [1][2]. From this photo[3] the size of "Super Mario" follows that convention. It is obviously true that there are more options for names but congratulations to "Don Mario".
i think hypermarkets achieve their bigness not by being bigger supermarkets, but by selling everything a supermarket sells, and then also selling everything a department store sells.
[1] https://en.wikipedia.org/wiki/Hypermarket
[2] https://en.wikipedia.org/wiki/Supermarket
[3] https://www.techspot.com/news/106591-super-mario-supermarket...