That´s true, but it really looks like the other ones are being ignored (like it was already said).
For example, when I just played sapphire, I had 381 Pokémon, missing who?
Mew, Lugia, Celebi, Jirachi and Deoxys, it was really boring to see it, after 490 hours of playing.
Thank they have created the wi-fi or my pokedéx would be incomplete forever