It will take forever. I'm working on it and I'm at just over a hundred hours with 563 seen and 510 obtained and that's after transferring all of my Pokemon over from Pearl and HeartGold. (Though, I never completed the pokedexes in those two games and just caught everything I saw.) I wouldn't recommend trying it without at least playing HeartGold/SoulSilver. I'm told it's possible to complete the national dex using just DS games. (Though I'm ready if I need to use my copies of Emerald and Fire Red. )kodt said:Total Pokemon noob here. I only played the original Pokemon Red back in the day.
Just a question I have out of curiosity, what exactly would be involved with catching all 646 pokemon?
Would you need to have played older GBA/DS versions and transfer them or can it all be done on Black/White?