Hi Murilo,
I will close my thread because my doubt should be discussed in a WiiRemoteJ.jar forum. I would divide the Wiiremote hardware between genuine and non-genuine. There is some clones (non-genuine) which are easy to identify through a stamp, layout or the missing Nintendo(TM) logo. But I could find several non-genuine Wiiremote with an identical external appearance, although they exchange data in a different way when compared to genuine ones.
I think it’s possible to disntinguish original Wiimotes from “clone products” through the device’s MAC address, see this webpage for example. I don’t have any non-original Wiimote, hence didn’t test my app with any third-party Wiimote clones.
Good luck.