There is a Mario cheat book available for every console. In that book one can find hints and cheats for every Mario game including the Mario Kart for DS.
If you go to http://uk.ign.com/cheats/games/mario-kart-64-n64-502 you will find all the cheats!
there really is no cheats to find something but you could use Saint Anthony. ( Oh saint anthony, something must be found. please help me find my mario kart game)
here
1. Go to Mario Kart Chanel and click on 'Rankings'
No where
Sorry, but there are none.
norway?
Unfortunately, Diddy Kong is not one of the characters in Mario Kart 7 =(
you can go to cheat websites but you won't find any cheats there besides hints
Find it at any game store
to do your best and find shortcuts
You will have to find out from your local store!