There is something called the Standard Clauses that should be and are expected to be followed in battles taking place on this forum.
Uber Clause: No UBERS ALLOWED (see tier list)
Sleep Clause: No two pokemon can be asleep in a team at the same time (not counting self induced sleep).
Item Clause: No more then two of an item can be used.
Evasion Clause: Moves that increase evasiveness or lower your opponent's accuracy are banned (it makes the game about luck)
OHKO Clause: No OHKO moves (Horn Drill, Sheer Cold, etc.) Also make the game about luck.
Self KO Clause: This is rare but necessary, if you and your opponent are on your last pokemon do not use moves like Explosion to induce a draw.
***NEVER DISCONNECT IF YOU ARE LOSING OR HAVE ALREADY LOST!!! IT MAKES YOU LOOK LIKE A NOOB AND WILL NOT BE TOLERATED HERE!!