via The Daily What.

At a stretch, I’d go to 251, but then things start to become weird – Ruby and Sapphire, and Fire Red, Leaf Green and Emerald just made things bizzare at 386 Pokemon, plus these version only suggested to users to catch a selected assortment of Pokemon, rather than the “Gotta catch ’em all”, “Pokemon Master” mentality of the earlier games.

Then all sanity just went out the window with Diamond and Pearl – 107 new Pokemon were added to bring the species count to 493.

More reading: Pokémon – Wikipedia, the free encyclopedia