Peach Blossom is Princess Peach's Final Smash in Super Smash Bros. Brawl and Super Smash Bros. for Wii U/3DS It can be performed after Peach comes in possession of a Smash Ball, where she'll then be free to unleash the strange performance. By the looks of it, the move that follows doesn't originate from a particular game, implying that this is the only character (as of yet) in Brawl whose final smash is completely original.
The attack will start with Peach stationed in the middle. She'll start to dance around to an exclusive tune, and all of the players will fall into an irreversible sleep. Meanwhile, Peaches will start to fall from the sky and dramatically damage the sleeping players - from at least 25-50% of damage. The closer they are to Peach, the more Peaches will fall on them. While this happens, a border will emerge from the sides featuring two pieces of artwork of the princess and a few Peach trees.
After this, the attack will stop; however, the players will still be asleep, and the player can choose to either attack them or to gobble up the peaches for more health.