The Copy Flower is a unique power-up found only in Mario & Luigi: Partners in Time. They resemble two-headed Fire Flowers but are purple and yellow instead. They are similar to the Double Cherry power-up in the Wii U game Super Mario 3D World.
Whenever the Bros. get it, they get multiplied and then run and jump on an enemy. Each time the player pressees the correct button, the brothers will move faster. With a very high attack power, the Bros. will be able to do more damage more than 999.
The player can attack for as long until the Copy Flower wears off after a wrong button press or when the enemy is defeated. Otherwise, it can go on forever.