Well in the game there are 7 boxes which can hold about 30 Pokemon each so tht is 210 total well apparently there are 287 final form Pokemon including legendries and those that don't evolve so when poke bank and poke transfer are released will it even be possible to "catch 'em all"
Yes because if you fill those 7 boxes the amount of PC storage will increase. Just place one Pokemon in each box you haven't filled and the number will increase. The maximum amount of storage boxes is 24 last I checked. (Might've increased due to 72 more Pokemon being added from X/Y)
Btw Welcome to the site :P