The Icons of the Hosts represent the ones they play as in MK8, even though SZ would actually be Metal Mario or DK or Waluigi, and SpiderStaryu would be his Mii.
I've played most, but of the ones we have featured so far MK1, MK2, MK3, MKM: SZ, and SM, we have either given up because they are TERRIBLE (Mythologies), or hit the Goro - like wall...