I've seen 350 and caught 211 I just got to the last city and have caught nearly everything in the routes so far and traded for all version exclusives(except for Xerneas). I haven't bothered evolving/breeding the giant number of Pokémon in my PC yet to fill out all the evoluions yet. Considering you have seen 476, I am guessing that the safari zone has Pokémon exclusive to the Nationaldex? As I believe that the total from the three regional dexes should be around little above 453?. Any idea on what the total currently available is?
I basically renamed two boxes "Breeding" and stuffed everything that had a pre-evolution I was missing into. Yeah the Friend Safari has loads of pokemon that are only available in the national dex and also six of the seven currently available starters, only missing Torchic.
I tried to calculate how much pokemon were available a few days ago and I think the number was around 595.