So it has come to my attention that a large amount of members on this site do not quite understand what the standard battle rules are for Diamond/Pearl, so I have compiled them here for you.
Standard Clauses are as follows:
No Ubers
This means that the following Pokemon are banned:
- Arceus
- Darkrai
- Deoxys (all forms)
- Dialga
- Giratina
- Groudon
- Ho-oh
- Kyogre
- Latios (both with and without soul dew)
- Lugia
- Manaphy
- Mew
- Mewtwo
- Palkia
- Rayquaza
- Wobbuffet
- Garchomp
- Shaymin-S
Evasion Clause and OHKO Ban
Sometimes grouped together as "No DT/OHKO". The following moves are banned:
- Double Team
- Minimize
- Fissure
- Guilllotine
- Sheer Cold
- Horn Drill
Self-KO Clause
This mostly only applies to tournaments. It's used to break ties. If both players are down to their last Pokemon and one uses a move that kills itself, such as Explosion, Self-Destruct, Destiny Bond, or Memento, the trainer who used that move is considered the loser in the match.
No "Hax" Items
The following items are banned:
- Brightpowder
- Quick Claw
- Focus Band
- King's Rock
- Stick
- Razor Claw
- Razor Fang
- Lax incense
Sleep Clause
You may only put one Pokemon to sleep at a time. Once that Pokemon wakes up, you may put it or another Pokemon to sleep again. But again, only one Pokemon on their team can be asleep at one time. Pokemon asleep due to the effects of Rest or Effect Spore do NOT count towards that limit.
Species Clause
Each Pokemon must be of a different species. Different Pokedex number means it's a different species.
Soul Dew Clause
The item "Soul Dew" may not be used. self explanatory.
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As for additional rules, some battlers may have a few of their own ideas as to what's fair and what should be useable.
Freeze Clause
Not that this one can really be helped, but it works the same way as sleep clause would, where only one pokemon on any one side can be frozen at any given time.
Item Clause
No item may be used more than once in any team, though leftovers is a common exception, and generally, 2 are allowed.