It may not make it through PokeBank.
This is because in 2007-2009, Black and White were not released and therefore Hidden Abilities were not released. Also, there are no Kanto or Sinnoh games with the Hidden Abilities, so there is a good chance the Pokemon will receive a red flag.
Of course, it's a possibility that it can get through if the legitimacy checker as it may not pay attention to the year it was received or the region it came from, but chances are it would. Sorry. :(
Hope I helped. :)