Allowed Controllers
Fight Sticks. To our knowledge, all fightsticks made by Hori, PDP, and MadCatz use a wired connection and do not pair themselves to the PlayStation. They are all allowed.
MadCatz Fightpads. MadCatz Fightpad use a bluetooth USB dongle to pair the pad to the dongle. Since they do not create a paring between the pad and the Playstation 3, they are allowed.
All PS2 Controllers used with a PS2/PS3 convertor. Dualshock 2 or other PS2 controllers used with a converter box to convert them to PS3 controllers are allowed. For players accustomed to using a PS3 controller, this is your best option. We have included links for a recommened convertor box and Dual Shock 2 controller for your convenience
More info here:
Evo Reminder: Wireless Dualshock 3 Controllers Are Banned! « Shoryuken
Good luck to your bro.