Kero Kero Keroppi no Bōken Nikki: Nemureru Mori no Keroleen is a Role-Playing game starring Keroppi from the Sanrio Hello Kitty collection. The translated English title is , "The Adventure Diary of Keroppi KeroKero: Keroleen in the Sleeping Forest"
Players take the role of Keroppi in Kero Kero village when Keroleen is kidnapped and taken to the forest where Keroppi and two friends must rescue her.
The game is intended for younger players. Consequently, the game is relatively short compared to other Role-Playing game from the same era.