- Bad Export for You: The Japanese version of JWTB allows you to download 100 songs from Wi-Fi. The European version limits you to just 50.
- Development Hell: DBB was originally intended for the Game Boy Color, but was moved to the Game Boy Advance by the time Nintendo unveiled it in 2001; it was delayed, and moved to the Nintendo DS.
- Marth Debuted in "Smash Bros.": Barbara the Bat, the main character in DBB was an Assist Trophy in Super Smash Bros. Brawl long before her game was released anywhere outside Japan. She was also in Master of Illusion, another DS game that was released overseas.
- No Export for You: Despite the original DBB getting a tentative title (Jam With the Band, in fact) in America shortly after the launch of the DS, the project was eventually canceled. To this date, the original game has only been released in Japan, and the sequel only in Japan and Europe.
Trivia / Jam with the Band