What are so good about Ubers except that they have good stats and they're Legendary?

Well, not all are legendary.

Pleaselog inorregisterto add a comment.

A Pokemon is considered Uber if it is too powerful to be reasonably handled within the bounds of the standard metagame.Uber status is determined by this factor alone; it does not matter if a Pokemon is worthless in the Ubers tier, or if it is outclassed by anything already in Ubers. In Ubers, a strategy or Pokemon may appear to be broken; this doesn’t matter as Ubers is essentially a ban list for OU, and nothing is currently too broken to be used in Ubers. Uber Pokemon generally have extremely large movepools and very high Base Stats when compared to OU Pokemon. -Smogon

Ubers are just overpowered Pokemon that are very strong.Hope This Helped :D

Hey StealthScyther99

First: not all uberpokemon are legendaries.If a pokemon is uber it is most based on: stats, type combination andmuch of them have a signature move.

Sources:http://bulbapedia.bulbagarden.net/wiki/Tiersandhttp://bulbapedia.bulbagarden.net/wiki/Tiers

Hope I helped youLuc

The rest are Legendaries. Not much to say about them.