AG

“AG (Anything Goes) is a 6v6 singles metagame that has the fewest restrictions found in any of Smogon’s formats. Every Pokémon from any tier is allowed, and because the Species Clause is lifted, you can have up to six of the same Pokémon on your team. In fact, all clauses besides Endless Battle are gone, so strategies that are generally deemed uncompetitive such as Moody and Swagger are completely usable here.” – Smogon University