Is the com speaker terminal on Bose 901 serie2 positive or negative?

Does a fake Bakugan bigger?

Not neccessarely. You have to look for the letters S/S/B (Sega Spinmaster Bakugan) and "made in China" engraved onto the bakugan brawlers. If there is no such things on your bakugan then it is a fake one. Bakupearl are genuine bakugan but they are bigger than Bakugan from serie1 and serie2. There are also genuine huge bakugans (DEKA).