Final Cutter is Kirby's Up B and third jump. Kirby draws a blue blade, jumps into the air a bit less than the height of Falco's full jump, and falls quickly, releasing a blue "wave" projectile forward. Generally hits best on the way up, and at the very end of the attack. Although it lost much power and use in the transition from SSB to SSBM, it is still quite usefull to skilled players. It should also be noted that the move as a whole can be moved much further horizontally when used on the ground as opposed to in the air.
Players using this move should take note that if knocked out of it, they lose all their jumps.