Okay, so it's the fault of the game's writers. The writing is just as shitty. One would have hoped that Kusaka could have deviated to smooth out any potential plotholes.Except that is exactly how the games deal with these things. The games explicitly say Pichu was discovered by Utsugi (Elm) and GSC explicitly treats the Pokémon Egg as a new discovery. Even the official promo for XY treats Sylveon as newly discovered. And I could be wrong, but I think everyone seems to know about the legends of Johto in GSC despite said Pokémon being "recently discovered".
Now, that I wasn't aware of. I again apologize that I'm not able to scour every Pokemon news site 24/7 to be knowledgeable about every little detail. Besides, there's a shitload of bad information being thrown around (Pokebeach, Serebii, and Bulbagarden are not the only sites talking about Pokemon), it's hard to take these things seriously without a shitload of proof.The guy leaked the English names of Gogoat and the other three. This by itself gives enough credibility to him. Anyone can guess things like "Fairy type", which is almost obvious basing from all the Sylveon type hype, but who would be able to get all the four names correctly if they were just trolling? He even lost his job because of the leaks (Full story here). There's no way a false leaker would get into trouble with the company from whom he/she is supposedly leaking info from, so it's almost impossible for him to be lying.
Not re-releasing at least Gen III on the VC would be foolish. Virtualizing and giving them some capability to transfer Pokemon to Gen VI would be 1000x easier and cheaper than developing remakes (of remakes, I might add).I remember hearing that Nintendo/GF said they wouldn't release the old games for the virtual console. Though they could just be referring to G1, or I could be forgetting something.