In Super Smash Bros Melee, the Luigi Cyclone is Luigi's Down B special attack. It is similar to the Mario Tornado. The attack makes Luigi spin around wildly. It can be used as a vertical recovery move by button-mashing the B button, but this only works after a jump because the move carries Luigi's momentum with it. If used while falling, this move will just slow Luigi's fall. It is generally perceived as being very difficult to to get the full height due to the number of times the player needs to push B button during the animation. This move does not put Luigi into a helpless mode, so you can use the Super Jump Punch after. It is a multi-hitting attack.
In Super Smash Bros Brawl, the Luigi Cyclone can travel across the stage quicker with it, but there seems to be less control, and it is harder to trap the opponent within it. The vertical recovery distance is now easier to perform than its Super Smash Bros. Melee counterpart. This move gains higher total altitude than his Super Jump Punch. If the Cyclone is used at the peak of Luigi's mid-air jump, it is much easier to gain height. In other words, this change has improved Luigi's recovery skills.
Luigi can also perform a technique similiar to Koopa Hopping with the Luigi Cyclone. Pressing Down+B right before Luigi touches the ground allows him to instantly use the move again. [1]