so now made up mariokart.
If you have mariokart7 you can make up grand prixs.

charaters: (any charaters from mario)
grand prix: (any mariokart course)

for example:
charaters: mario, luigi, bowser, peach, wario, waluigi, Rosalina, dry bones, donkey kong, starlow, koopa and toad.
Grand prix: the grand prixs

mushroom cup.
mushroom gorge.
koopa cape.
maple treeway.
coconut mall

flower cup.
waluigi pinball.
delfino square.
toad factory.
waluigi stadium

star cup.
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special cup.
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shell cup.
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banana cup
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leaf cup.
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lightning cup.
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so do you get it now