Much of what makes Pokémon appealing to its most dedicated players isn't readily apparent to its more casual fans. The "pro" Pokémon player is someone who knows every in and out of the game, who goes way beyond the surface knowledge most players have and seriously commits to the breeding and training of Pokémon so they're ready for battles with other dedicated players.
How Pros Play: Fight and defeat the same type of wild Pokémon over and over again to raise your Pokémon's EVs. Hordes an' even Super Training clearly don't exist an' EVs matter ingame.
How Pros Play: Restart and restart again, until you get a Pokémon with the right nature. When most Pokémon players receive their first Pokémon at the beginning of each new game, they're usually just happy to get on with it and start catching whatever that generation's equivalent of Pidgey, Rattata, and Caterpie are.
Each monster's nature raises a certain stat and lowers another. You want it to benefit your new Pokémon's strengths. And that's not even the only unalterable variable hardcore players consider when they obtain a new Pokémon.
