uber [oo-ber]
adverb
1. Having a specified property to an excessive or extreme degree; very.
adjective
2. Designating a person or thing that exceeds the limits of a normal example of its kind or class.
EX. Hey, Genesect! Move aside for the original uber Legendary Pokémon from my childhood!
What's that good readers? You would like to know what separates uber Pokémon from the lesser peasants in the other tiers? Let's see what specifics a Pokemon needs to be declared in the uber tier for the competitive scene. An uber Pokémon, simply, has to be defined by usually Smogon or Pokémon online as being far too powerful for the standard metagame. Many of these Pokémon have a combination of stats, moves, typings, and abilities that give them an edge against most Pokémon and, according to Smogon, Genesect will soon join the ranks of Groudon, Reshiram, and Wobuffet. Yes, Wobuffet is uber because with an ability to prevent Pokémon from escaping he can switch in with his huge health stat and then kill an opponent's Pokémon with a Counter or Mirror Coat faster than you can "WAH!"