Well each Pokemon has an index #, mostly used for programmers for a specific purpose. In the first Gen the gave the Pokemon all weird #'s like Rhydon was #1 because that was the first Pokemon programmed into the game and created.
They have index #'s for everything (items, maps, sounds,) and for some reason there was 190 numbers marked for Pokemon.
I actually like Drillbur and Glitze, the rest are truly awful, I've seen plenty of Fakemon with way better design/concept than the ones from the 5th gen.