OP is fucking retarded edition

Introduction to Competitive Pokémon: http://www.smogon.com/dp/articles/intro_comp_pokemon

Online Pokémon Simulators:

Pokémon Showdown: http://www.pokemonshowdown.com
Pokémon Online: http://www.pokemon-online.eu/

Official Website: http://www.pokemon.com/us/


Other Informative Websites:

Serebii: http://www.serebii.net/index2.shtml
Bulbapedia: http://bulbapedia.bulbagarden.net/wiki/Main_Page

Tiers Explained: http://www.smogon.com/bw/articles/bw_tiers
Clauses and Banlists: http://www.smogon.com/xyhub/tiers
StrategyDex & Movelists: http://www.smogon.com/dex/xy/pokemon/