I thought Talonflame was pretty surprising. Although it is frail like most people say, attach a Choice Band to it and use Brave Bird with Gale Wings, I've got a lot of wins using Talonflame. :3
I thought Excadrill in the anime looked stupid and overdesigned, then i played white, now he is my fave pokemon after ivysaur, phanpy, heracross,klefki,goomy line,haunter,horsea line,yanmega,sceptile, and a bunch of others.(he is top 5)
Hmmm ... Charizard. I didn't like it because I thought it was overrtaed, but now ... I like it and use it!
doze stealth rocks doe
I could understand Pikachu because... Light Ball... But the others? How could you? Specially Plusle and Minun.
Talonflame - "Guaranteed priority off of what? Base 80-something attack? lol!"
Azumarill, but in my defense this was based off of Gen 2. Took me Gen 4 to even notice it had Huge Power, and then I realized it was pretty good. Wasn't until Gen 6 when it got fairy typing and such a nice looking 3D model that it appealed to me and became one of my favorite 'mons.
Mega Pinsir - Crap design, crappish non-Mega form, thought it was garbage. lo and behold, one of the most dangerous threats in OU. I also forgot it had such good coverage with EQ/CC, I figured Aerillate flying STAB and a megahorn or something would be the extent of it's type coverage.