Milktank for a lot particular reasons.
Umbreon, can never seem to have a good counter to it in any scenario.
Vespiquen. Aarons in particular. It outspeed all of my team. So it would use attack order, defense order and heal order in combination to annoy the hell outta me. Its defense was so high i could barely damage it.
Oh yes, one of the posts reminded me... Pikachu ._. And also Pichu, Plusle, Minun, Pachirisu and Emolga. I hate all of them.
Close Combat is your best bet. On topic I can never forgive Tobias for using not 1 but 2 legendaries in the Sinnoh League! That really pissed me off! As if legends aren't advertised enough!?Umbreon, can never seem to have a good counter to it in any scenario.
People who whine about how Charizard is 'overrated'. Seriously, how is he overrated? All I've ever heard anyone say about him since some idiot at Game Freak came up with Stealth Rock is how much he sucks.