Wii Rock Band Drums Compatibility with PlayStation 2
No, Wii Rock Band drums will not work on a PlayStation 2.
Technical Incompatibilities
Wireless Protocol: Wii drums use Bluetooth (proprietary Nintendo stack). PS2 uses USB (wired) or proprietary dongles (Guitar Hero dongles) on the 2.4GHz band—not Bluetooth.
Dongle Pairing: Each Rock Band/Guitar Hero instrument set pairs to a specific USB dongle coded for its console (Wii, PS3, Xbox 360). A Wii dongle cannot pair to a PS2, and PS2 has no Bluetooth stack for instruments.
Pad Electronics: The piezo sensors and multiplexer board are wired for the Wii dongle's polling protocol.
Game Software:Rock Band 1/2/3 on PS2 only scan for PS2-licensed USB dongles. They ignore unknown USB/HID devices.
What You Need for PS2 Rock Band
PS2/PS3 Rock Band Drum Kit (wired USB or wireless with PS2/PS3 dongle).
Guitar Hero World Tour / Warriors of Rock / Band Hero PS2 drum kits (compatible with Rock Band on PS2 via USB).
Ion Drum Rocker (electronic drum brain + PS2/PS3 dongle) – pro option.
Console ecosystems are walled gardens for peripherals. Cross-platform instrument compatibility essentially does not exist for 7th gen (Wii/PS3/360) and earlier.
