So i can't find anything on this. In many Nintendo games. There are significant version differences that effect speedruns. japanese games are used in some games because of slightly faster loading time like in Super mario sunshine for example. Does anyone have any idea if this might be the case in MKWii? or if any other version saves time on loading. Could be a big deal in 100% if it's the case

doesnt WiiU save loading time over Wii?

Yes it does. I was hoping someone knew about game version differences