Diamond/Pearl UnderUsed Metagame PrimerCompositionUU (UnderUsed) is Smogon's second usage-based tier. All Pokémon that are not OU by usage and are not banned to Ubers or UUBL can be used in UU, including Pokémon from NU. While any of the aforementioned Pokémon can be used in UU, only those Pokémon that make up at least ~3.41% of total weighted usage in the tier are designated UU. A Pokémon is truly UU 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 UU Pokémon and those with UU analyses for the DP era are found on the dex page. Play RestrictionsPlayers cannot use Pokémon from the Uber tier, OU, or UUBL. Players must abide by the following clauses:
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