Kumite is an on rails sword slashing brawler with dozens of Miis to fight at once. When you start kumite your Mii automatically runs until it's surrounded and stopped by a group of Miis. You have to slash and trash the other Miis before they hit you and sap your three hearts.
Most Miis are cowards and vanish in a blue light after getting hit once. Kumite mode has mid-boss Miis with two hearts that also block and a real boss with three hearts to face at the end of every level. There are ten stages to play and that take place in various parts of the island. One level is in a castle and in another level you walk up a mountain. Levels also change depending on the time of day. You can fight in the castle at night or at noon. I know these settings are generic, but I they vaguely felt like I was playing The Legend of Zelda Swords.