It was based on a story hosted on the Unending BE Addventure. I didn't write it, but I very much enjoyed it, so I've had a few commissions based on it. In the story, Samus, Peach, and Zelda are transformed by magical candies.
Samus is transformed by Damsel Delicious Dots, which turn her into a hyperfeminine ultra-girly princess, and also has a few Bimbo Beans turning her into a ditzy airhead.
Peach and Zelda share a Trait Transfer Treat which swaps their personalities. Picture Related: In this picture their palettes were actually swapped then altered by further transformations.
Peach is further transformed by Gothic Grape Gummies, which turn her into a snarky and mopey goth girl, while Zelda is transformed by copious amounts of Bimbo Beans, which turn her into an overdeveloped bimbo and a complete airhead.