In the Japanese version of the game, the character Chao from the Japan-only game, Famicom Mukashibanashi: Yūyūki (ふぁみこんむかし話 遊遊記) can be found in a bag that is guarded by a mid-boss. She can only be found in the bag if the player already has the corresponding animal friend. She has a very low chance of showing up, and when she does, she gives you an extra life and adds 1% to the game's completion, making it necessary to find her to get 100% completion. She is replaced by Gooey in the international versions.