The official Pokémon World Championships 2013 website has announced that Smeargle will be distributed to all visitors. Below are the details.

Press Release

Start filling up your Pokédex with the help of a cool Smeargle from the Pokémon World Championships!

This year at the Pokémon World Championships, get Smeargle for your game via wireless distribution. This Smeargle is designed to be the ultimate Pokémon for helping you catch wild Pokémon! It knows the move False Swipe, which does damage but will never make the opposing Pokémon faint, Spore to make the Pokémon sleep, Mean Look to keep it from fleeing, and Odor Sleuth to make sure Smeargle can hit Ghost-type Pokémon and other evasive Pokémon! This Lv. 50 Smeargle even has high Speed and Attack stats to help make sure you’re ready to catch any Pokémon you encounter.

Remember to bring your Nintendo DS or Nintendo 3DS system and your copy of Pokémon Black Version, Pokémon White Version, Pokémon Black Version 2, or Pokémon White Version 2 when you visit the Vancouver Convention Centre. The Smeargle distribution will take place on Saturday, August 10th from noon to 8 p.m. and Sunday, August 11th from 9 a.m. to 4 p.m. Don’t miss it!

Source: http://www.pokemonworldchampionships.com/2013/updates/article/gettingready/get-smeargle-and-start-catching