I live in Europe and have a PAL Wii. I am visiting the United States, if I buy a controller then it will work here? thx

Non Europe and the U.S. have different electrical power. If you try to plug something into an outlet on the U.S. to Europe, you get an electric shock.

Playing NTSC (USA) Brawl in PAL (EUROPE) Wii Works with 3.2E