Well "Matrix game" is completely irrelevant and "Where to find these" doesn't really belong on the wiki IMO (but I'll leave it there for now if anyone thinks its worth improving).
Pokemon Black is totally fictional (not even a rom hack) but maybe we could keep it if the article makes its origins clearer - its still kind of a part of bootleg gaming history just by virtue of being a famous nonexistent bootleg game. I don't think ChaosBlack should have an article though, it's just a rom hack that was bootlegged in cart form without the hacker's knowledge - there are tons of Pokemon pirates like that on the GBA (I have one called "Frigo Returns"), one article covering all of them would be sufficient.