Tier of the day!

UU (Under-used)

Under-Used, commonly referred to as "UU", designates Pokémon whose use is limited as they are not strong enough for general OU competition, usually due to sub-standard stats, movepools, easily exploitable weaknesses, or the existence of a stronger Pokémon that works in a highly similar way. UU Pokémon can be, and are, used in OU battles, but are usually underpowered here.

For a list of Pokemon currently in this tier, please visit: http://www.smogon.com/dp/tiers/uu

Also note that due to the metagame constantly changing, Pokemon in this tier are moving up and down the tier ladder as new things are being discovered.