We previously "fixed" virizion, seviper, cacturne, zangoose, luxray, vespiqueen, audino, samurott, banette, carnivine, lapras, flareon and rampardos.
If you're interested, here's a list of all pokemon previously discussed, and their improvements as suggested by anons in previous threads:
http://pastebin.com/RzwLAG7QHow would you improve the worst (competitively speaking) of the pokecats?