Any Pokemon may not be used more than once on an individual's team. If a Pokemon has multiple formes, for example Deoxys, only one forme may be used per team.
You may not induce sleep status on more than one of your opponent's Pokemon at a time. Self induced sleep through the use of Rest does not count towards Sleep Clause. Sleep induced sleep through the use of sleep moves against Magic Bounce and Magic Mirror counts towards Sleep Clause
Wifi Battle Clause:
Team Preview must be used prior to each battle.
The use of moves whose sole effect is to automatically knock out the opposing Pokemon are prohibited.
The use of moves and items whose sole effect is to increase your Pokemon's evasion stat are prohibited.
Hax Item Clause:
Items that function solely off of luck, or introduce an unnecessary amount of luck into the game, are prohibited. These items are;
Self KO Clause:
If an individual attempts to use a self-KO move to force a tie game, that individual is considered to have lost.
Clauses Exclusive to Tiers OU and Below
Drizzle/Swift Swim Complex Ban:
An individual may not use Pokemon with the abilities Swift Swim and Drizzle on the same team.
The use of the ability Moody is prohibited.
Clauses Exclusive to UU
The use of the ability Drought is prohibited.
You may not induce freeze status on more than one of your opponent's Pokemon at a time. Given that freeze status is only possible through uncontrollable secondary effects, there is no way to enforce this clause during battles using the Nintendo DS games.
Optional, Unofficial Clauses
Any item may not be used more than once on an individual's team.
Any Pokemon currently identified as a suspect in the players' chosen tier is banned. Current suspects are fully listed in the following post.
An individual has a limited time to decide what to do each turn. If this time expires without the individual performing any action, they forfeit the game.