i was kinda hopingg the new national dex function added to the bank was based on pokemon you've deposited to the bank, rather than being based on the dexes of individual games. this means I would lose my complete national dex were I to restart my Pokemon X version., and I wouldn't be able to get data back for things I decide to send up to Sun and Moon because Sun and moon doesn't record national dex data.
there's a lot of REALLY weird quirks to using Poketransporter with your VC Copies of games. namely, it essentially rather than trying to make any sort of direct corilation between old and new stat calculations, just essentially rolls up a new pokemon with the nickname and species of the pokemon you send to the Bank. Gen 1's version of effort points get reset, and the pokemon are gaurenteed 3 perfect IVs and their hidden abilities. obviously, certain illegial combos of level and evolution, as well as move combos (there's currently a bug that Mewtwo is an illegial mon if you teach it pay day with the TM and then try and send Payday Mewtwo to the future.
It does indeed filter out Mews that have an invalid OT data as well... of course, if you were to say... name your Trainer "GF" and had the same OT number as the event mews distributed in the UK for the Sun and Moon launch... you could in theory fool pokebank and if you impart the proper data,