Pokemon Platinum Registration Number Is My Pokemon Platinum Real?

Is my Pokemon Platinum real? - pokemon platinum registration number

I bought a "new and sealed" copy on eBay, with the lid and look real. But there are some strange things:

1. The game cartridge is discolored. If someone is a photo of a real cartridge upload could be estimated. Even the little note on the back of the cartridge would be nice.
2. The game contains no instructions for Wi-Fi.
3. The game can not be fitted sheet (which is a unique registration code for Club Nintendo must have). Maybe I should not insert the disk at all, but if need be, please tell me. Thank you.