Thanks silversonic. alright I'll get to the meat of what I'm trying to accomplish.
Basically, I want to run single segment attempts of the game which would require deleting the story data which I am okay with. However, I still want to save my best time attack times within the network and cartridge. Also, not having to get the red rings multiple times over is a big plus. I don't think changing miis will affect the save data at all. So, the only solution I can come up with is getting a second game cartridge.
I just want some suggestions on what I could do in this situation.