A bred pokemon will most likely always be legal, since the parents can't pass down illegal things.
I assume the game's checking system is the exact same as Pokemon Bank. In this case, then Pokemon Bank might actually be unable to filter out illegit but legal pokemon. (a.k.a hacked pokemon with movesets that are possible)
http://gbatemp.net/threads/pok%C3%A9mon ... ed.356731/
Some hackers have already injected a Pokemon into X/Y weeks ago, and that Gible has the pentagon. Assuming that it was hacked and not just a really elaborate prank (hatching a shiny that passed down a premier ball), then Pokebank isn't as hack-proof as Nintendo claims.
I assume the game's checking system is the exact same as Pokemon Bank. In this case, then Pokemon Bank might actually be unable to filter out illegit but legal pokemon. (a.k.a hacked pokemon with movesets that are possible)
http://gbatemp.net/threads/pok%C3%A9mon ... ed.356731/
Some hackers have already injected a Pokemon into X/Y weeks ago, and that Gible has the pentagon. Assuming that it was hacked and not just a really elaborate prank (hatching a shiny that passed down a premier ball), then Pokebank isn't as hack-proof as Nintendo claims.