No required accessories. LEGO Rock Band on Nintendo DS plays entirely with the system's built-in hardware:
Do not exist for DS. The console versions (Wii, PS3, Xbox 360) support instrument peripherals. The DS version was designed from the ground up for touchscreen/buttons only. No accessory port supports instruments.
The DS version features a unique "Story Mode" touring LEGO venues, unlocking songs, and building your band. It's a full rhythm game—not a watered-down port. Designed for pick-up-and-play on stock hardware.