Crash Bandicoot, Klonoa and Yoshi had anime?! To be fair, there was a Fire Emblem OVA with Marth in it. But, Marth is still from Fire Emblem.
Plus, a big glitch like that seems rather unlikely. Demo's sent to me (as a beta tester) contain a certain amount of characters, the public demo had a lot less characters than the secret demo's that we get. In short, they made a new file and most likely only used character data for the characters they wanted to use. Ergo, there shouldn't be data for other characters in there, regardless of who they are (even though Yoshi and Marth are likely candidates anyway).
If we believe that to be true, that means you got this information through other means, either through a leaking beta tester (who, at this point, would be rather unlikely to continue to be one d:) or otherwise. Basically.. Pics or it didn't happen.
Lastly, there is no Nintendo or Smash in the title, the staff has never promised you to only bring Nintendo characters so stop whining.
tl;dr: You're lying and if not, stop bitching