Katekyo Hitman Reborn! DS: Mafia Daishuugou Vongola Festival is a Game for the Nintendo DS. You travel around the Vongola Underground Base playing Mini-Games and get money to buy maps and items for the Gallery Mode.
This Game theme is mini-game, you travel as Tsuna for the Story Chapter on Vongola Underground Hideout. Each mini-game have different process to complete it.
After you complete Story Mode (Chapter 20), You can access another chapter by buying the Map on the Casino in Floor 1. In there you can also buy another mini-game and voice for the theater.