Diamond/Pearl OverUsed Metagame Primer

Composition

OU (OverUsed) is Smogon's fundamental usage-based tier. With the exception of Pokémon banished to the Uber tier, every Pokémon can be used in OU, including Pokémon from UU and NU. While all non-Uber Pokémon can be used in OU, only those Pokémon that make up at least ~3.41% of total weighted usage in the tier are designated OU. A Pokémon is truly OU if a typical competitive player is more than 50% likely to encounter that Pokémon at least once in a given day of playing (20 battles).

A list of the current OU Pokémon and those with OU analyses for the DP era are found on the dex page.

Play Restrictions

Players cannot use Pokémon from the Uber tier.

Players must abide by the following clauses:

  • Sleep Clause: If a player has already put an opposing Pokémon to sleep using a sleep inducing move and that Pokémon is still sleeping due to that sleep inducing move, the player cannot put another opposing Pokémon to sleep using a sleep inducing move.
  • Species Clause: A player cannot have two of the same species of Pokémon on their team, based on the National Pokédex number. For example, a player cannot have two Koffing on their team.
  • Evasion Clause: Players cannot use Double Team or Minimize in any of their Pokémon's movesets.
  • OHKO Clause: Players cannot use Horn Drill, Guillotine, Sheer Cold, or Fissure in any of their Pokémon's movesets.
  • Timer Clause: If a player exhausts the timer, they lose.

Players cannot use the following abilities:

Players cannot use the following items:

Players cannot use the following moves: