Most recently included in Pok?on Ruby and Pok?on Sapphire, the National Pok?ex was created due to Nintendo changing the numbering scheme when they released the second generation of pok?on games.
The National Pok?ex keeps with the classic numbering system as based in Kanto, a "province" of the Pok?on world that shares a similar name to an area around Tokyo, Japan. Although the terms National and Regional have no meaning in the real world as they are used in the "country" and "regions" in the video game world of Pok?on.
The numbering scheme begins at 001 and currently ends at 386. It differs from Regional Pok?ex, where each region chooses its own method to number local species of pok?on and keep the more distant rare species towards the end.