The final battle ring appears if the two opponents are still locked in a draw after three rounds. It doesn't matter if you win or lose. You can get this stamp in single-player mode only.
Straight to the Point:
Push your opponent out of the ring with a lunge in single-player mode.
Met Your Match:
Draw three rounds in a row to get to the final battle ring, then draw again for a completely even match in single-player mode. You may not have won, but it's no easy feat!
Push your opponent out of the ring with only one strike in single-player mode.
Last Mii Standing:
Defeat the champion in a duel. The key is to never let your defenses down and attack any gaps you see. There may be some sort of reward if you win this...
Slice and Dice:
Win the contest without missing a single object by slicing the wrong way or failing to slice within the time limit. You can only get this stamp in single-player mode.
Correctly at least one of each of the 18 types of objects in single-player mode. Different colors count as different types You'll need to play several rounds to get them all!
Cut an object correctly before it even hits the ground in single-player mode. You have to by psychic—or lucky—to pull this off.
Slice the alarm clock when the two digits on the display are the same, such as 8.8, 7.7, or 6.6. You can only get this stamp in single-player mode.
A Cut Above:
Beat the Speed Slice champion (Matt). Empty your mind and slice with your instincts!
Not a Scratch:
Clear any stage without taking a hit and losing a heart.
Defeat all of your foes to clear the first 10 stages. You can't just swing wildly and hope for the best—it takes finesse.
Clear Stage 10 without taking a single hit and losing a heart.
Fight through the final Showdown stage. You must master the art of parrying.
Fight through the final Showdown stage without taking a single hit and losing a heart.