When performed, Peach would summon Twink, her small star companion, who would create a pink energy beam. The other 7 Star Spirits would then create a larger beam, giving the attack more range. This attack could drag opponents upwards while dealing multiple hits of 1% damage each. Peach was able to move freely during this move and attack the trapped opponents, racking up even more damage.
Peach Beam is an ability that Mario could perform in Paper Mario. It was an upgraded version of Star Beam that helped him nullify the Star Rod's power in the last battle against Bowser.
Although Peach could never perform the attack, it was her wish to grant more power to the Star Spirits that upgraded the Star Beam into a more powerful move. Twink, who helped Peach throughout the game, also plays an important role on the attack, adding both his power and the wish's power to the beam.