original_query: What are Yume Kira Bags and how are they used in the Tamagotchi world?
query: What are Yume Kira Bags and how are they used in the Tamagotchi! Yume Kira Dream series?
answer: Yume Kira Bags are mythical bags given to Yumemitchi and Kiraritchi.  They allow the users to disguise themselves and help other Tamagotchis in difficult situations.  A Tamagotchi named Yumecantchi also emerges from the bags at one point.