Fake items are anything that purport to be something they're not - eg a Nike symbol on a shoe not manufactured by Nike.

Your items aren't fake, per se, but I'd be willing to bet that some of them are unofficial, unlicensed (i.e. the names and images used without permission), and if so are a serious breach of copyright which would mean you are selling them at your own risk. If pursued, the fines for selling unlicensed items can be significant (I'm talking hundreds of thousands).