大合奏！バンドブラザーズDX (Daigassou! Band-Brothers DX) is a music game developed and published by Nintendo for the Nintendo DS in 2008. The game is a sequel to the original Daigassou! Band Brothers game which was released in 2004. The game features a variety of songs from different genres, including J-pop, classic rock, and anime songs, as well as a selection of original tracks. Players can play alone, or form a band with up to four players. The game also features a 'jam mode' which allows players to create their own music with a variety of instruments. Players can also use the Nintendo DS microphone and camera to record their own performances. Daigassou! Band-Brothers DX also features a variety of mini-games, as well as a shop where players can purchase items. The game has been well-received, with critics praising its diverse song selection, fun gameplay, and replayability.