A Yellow Apple is an item in Super Paper Mario. It is orange in colouration to distinguish it from the Golden Apple, and in the PAL version of Super Paper Mario, it is known as the Orange Apple.
Found on a tree in Overthere Stair, the Yellow Apple restores 5 HP and cures poison. If the player tries feeding Peach this apple, she wakes up from the deep sleep caused by the Golden Apple and wonders what's happening. Then, suddenly, she grows a mustache. A few seconds later the effect wears off, the mustache disappears, and she goes back to sleep.