During the Battle of The Midair Stadium, Princess Zelda was rendered weak after she was freed from the clutches of the Petey Piranha. Having Kirby saved Princess Peach, Zelda was defenseless, so Wario took a shot at her with the Dark Cannon, turning her into a trophy.
Having time past, Kirby and Peach were left alone in a grassy area, but Kirby ran away, thinking he saw or heard something, Peach then tried to stop him, but then a loud noise struck behind her. Peach was very surprised as she saw Bowser charging up a Dark Cannon towards her, Peach gasped and hesitated for too long that she was turned into a Trophy.
Moments later, False Bowser was seen alongside the real Bowser. False Bowser then deteriorated into Shadow Bugs. While deteriorating, the Shadow Bugs engulfed Peach, creating False Peach.
Soon after that, False Peach was seen up at a high peak of a mountain, attempting to permanently Freeze Mario and Pit with the Dark Cannon. She was caught doing this by Link and Yoshi, and was then defeated, but not for long.
Bowser had soon returned and had captured Peach and brought her to the Halberd. There, Peach and Zelda were seen caged and hanging on the ceiling. Shadow Bugs, again were attempting to recreate False Peach, and also created False Zelda. They see three beings, and look at them with inciting hatred. These beings were Meta Knight, Lucario, and Solid Snake. All 3 were forced to battle against the False Princesses, and then defeating them soon after. Upon their defeat, the False Princesses were shrouded in dust, only to see the real Peach and Zelda.
After that, False Peach's "Essence" (her remains in Tabuu's Great Maze) is then seen in the Great Maze. After she is defeated, she is not heard of again in the main storyline.
False Peach shows a strong resemblance to the real Princess Peach. The only difference in her appearance is that her eyes glow a bright yellow, her body is shrouded by a purple aura, and she is rendered to be darker.
Powers and Abilities=
Her fighting style remains the same as the original, she can still use her umbrella, heart power, levitation, and other powers. False Peach has added some other attributes though, as she is capable to transform into Shadow Bugs. She can also carry large and heavy things that the real Peach could not normally carry, such as the Dark Cannon.
False Peach glaring angrily with hatred at Link and Yoshi.
False Peach re-appearing in the Halberd.
False Peach and False Zelda challenging Meta Knight, Lucario, and Solid Snake on the Halberd.
False Peach returning to the real Peach.
False Peach's Essence confronting the real Princess Peach.
False Peach is not encountered in Boss Battles, even though she is a boss. This boss can strangely be playable by replacing one of Peach's .pcs files with the fake one that comes from the "FitPeachFake.pcs" and .pac file assets. The boss character's archive file must be named to a number of Peach's re-color assets as a replacement to be playable. To make this variant playable in all Subspace levels, replace the file "FitPeach00.pac" and .pcs files.