RBY Misty, no doubt. It took me for-freaking-ever to get past that Starmie of hers. I even tried trading in an Articuno from a friend's game, and it beat me b/c Articuno wouldn't listen to me, lol. Eventually, I just gave up and
rare candied leveled Butterfree to ~mid 30's range and handed Misty hers.
Bugsy comes in a close second in GSC and HG/SS. That Scyther had to be hacked, it took out my fucking Quilava. And don't even get me started on how hard it is to beat if you use Chikorita.
PS! Alts: WolfLink, EonADS, Her Voice Resides, Begging for Mercy(RG #8 test alts), Across the Line, TheLastAmmunition
RU Record: #3, Wolf Link; 1951 ACRE on September 22nd, 2012
UU Record: #6, WolfLink; 1947 ACRE on September 18th, 2012
Ubers Record: #12, WolfLink; 1984 ACRE on September 19th, 2012
NU Record: #9, WolfLink; 1918 ACRE on November 3rd, 2012