Hello Kitty World

Hello Kitty World (ハロー キティ ワールド (Haroo Kiti Waarudo)) is a Balloon Kid clone and platform game that was released for the Famicom in 1992. It was developed by a small third party developer named Mario Co, and published by Sanrio Co., Ltd (the Hello Kitty franchise owner) under the name Character Soft Co., Ltd.

Story
Hello Kitty's friend, an unnamed bear, attaches too many balloons to himself and floats away. Hello Kitty chases after him.