To be honest, I'd be HIGHLY suspect of the authenticity of ANY chinese Wii products, especially if bought off eBay. Many seemingly legit auctions/products are in fact bootleg knockoffs. Even the hardware, as I found out when I bought what seemed like a too good to be true deal on a nunchuk/WiiMote, both of which were inferior knockoff bootlegs. I haven't personally heard of knock WiiFit boards as of yet, but it wouldnt surprise me if your game AND board were both just that.