The prefixes [Discussion]: discussions and polls; [Team Help]: team help; [Event]: events and competitions; [Group]: groups like traditional leagues, clans, and clubs; [Resource]: guides and resources; and [Battle Log]: battle logs, replays, videos, warstories, and journals. If you are unsure on which prefix to use, do not apply one.
General battle rules
These rules must be followed in battles hosted through the Battle Center and the PC Battle Server. However, they may be ignored if your opponent or the event or group is fine with it, provided that the battles are not perfomed on the PC Battle Server's ladder.
Standard play enforces the Species, Sleep, Evasion, OHKO, and Moody clauses (more information).
Item clause (standard only in GBU and VGC battles)
No more than one Pokémon on a player's team can hold the same item at the beginning of a battle.
Freeze clause (standard only in RBY battles)
No more than one Pokémon on a player's team can be frozen. This clause is not standard for Pokémon Stadium battles (RBY ≠ Stadium).
Illegal hacked Pokémon are banned. Pokémon with typing, stats, ability, height, weight, and moves that cannot be obtained in-game normally without the use of a glitch are considered illegal hacks. Pokémon created using an external device with normal features (legal hacks) are allowed.
Do not help players make decisions in a battle (aka ghosting).
In the case of events, if a disconnection occurred, recreate the situation when it happened. If this is not feasible due to unreasonable battle length, highly improbable circumstances, or some other reason, the player who did not disconnect may choose to rematch with either the same teams or new teams. If there is any suspicion that a disconnection was carried out deliberately to take advantage of this rule in any way, the offending user may be reported.
Submitting team help threads
The Battle Center's main forum only accepts team help intended for PvP (Player versus Player). PvE (Player versus Environment) or in-game team help should be posted in the In-Game Team Help sub-forum instead.
Team help that would not incite much discussion should be posted in the Simple Questions & Answers thread (i.e. set requests). Otherwise, team help belongs in individual threads (i.e. "Rate My Team" threads).
State what generation and format your team is for. If you do not, standard play will be assumed as the format.
Try to include descriptions on your team and its Pokémon. What is the team's goal? What are the roles for each of your Pokémon? What does your team have trouble with?
Remember that your thread is meant for team help first and foremost. Be willing to take constructive criticism and consider all suggestions.
Use a clear and readable format like the one below. A staff member holds the right to edit your thread in order for it to follow these guidelines more closely.
Smogon's XY Pokédex
For other generations, take a look at Smogon's Strategy Pokédex. Though the formatting might look odd, the links work. They're most likely in the middle of redesigning their website, so bear with them.