- online communities let you create custom communities with specific play parameters
- you can share these communities with others
- start with a list of the different items, characters and kart parts to choose what you want
- example: you can have a green shell only race or a Luigi only race or a standard kart frame race
- cannot specify more than one at a time
- Balloon Battles has you trying to pop as many of your opponents' balloons as possible within a time limit
- coin battles are timed as well
- six levels to choose from in battle mode
- Battle Course 1 from Mario Kart Super Circuit, Big Donut from Mario Kart 64 and Palm Shore from Mario Kart DS return
- Honeybee Hive, Sherbet Rink and WuHu Town are the new maps
- Mirror Flip races