Probably Ferrothorn. Or, even though I already have it in my team, Aron+Endeaver with Sandstorm raging.
Skarmory. Once it sets up spikes and stealth rock and if my tyranitar is dead I'm screwed. Reunciclus. idk how to counter it. o.o Breloom with Mach Punch, Spore, Swords Dance. UGH. then w/ the Fight Gem -.-' Politoed in rain obv. I run a Sand team so, eh. Nuff said.
The most annoying pokes I face are Jellicent, Sableye and Jirachi...just annoying, annoying, annoying! Will-O-Wisp, Taunt, Confuse Ray, Knock Off and Recover for the rage...
I'm changing my answer :3 I'm going to go with Suicune in UU. Completely insane bulk with a perfect typing for physical Defence and Calm mind available to stop special attackers after a few turns :(
Lots of things. Pokemon I can't counter, faster Pokemon. But what really annoys me the most is Jirachi (although I use one myself). twaveheadsmashheadsmashwishuturn
In Dream World Ubers, the Pokémon I most dislike facing is the Normal-type Extreme Killer Arceus by far. I even use a Choice Scarf Terrakion in my team almost exclusively to deal with it (although aside from that, it also serves as a great revenge-killer in general).
Tentacruel cause they appear all the time, Gravelers, for same reason, and Zubat/Golbats, because they are way to fucking common.
Once, I decided to take my cacturne off my sandstorm team, just as a test...the very next battle, I got swept by my OPPONENT'S Cacturne o_O
I think he's talking about in-game. Also LU is full of Ninjasks now, not that hard to deal with since everyone who uses them except Luck and Juggler are pretty much trash, but it is still annoying as all hell to deal with on a regular basis.
Those retarded and atrocious looking Reuniclus are despicable. I hate Reuniclus. Also Chansey and Blissey. ;_;
I 6-0ed Roy Mustang's Ubers team (which peaked at number one o_O) using a Lugia with the exact same set. It would be interesting to share Mustang's pain at that moment... lol He may be referring to the real games? I don't know, but one thing I do know about that is Zubats and Golbats are basically all you find in caves, and I run into them like every three damn steps. Max Repels are a must have. Those damn bats even appear while surfing, and even though they fly over the water instead of swim I still find them so annoying (don't say something stupid like "it's because they're blue"). If you're trying to flee isn't always so easy too, since it doesn't allow you in some cases and they always get the poisoning hax when they use Poison Fang. Um, lol?
lol yes that team was so lugia weak, and reshiram/heatran weak too. Needz moar kyogre. Anyways, a very annoying pokemon ish dugtrio. Choiced electric move (or ground move if it has balloon) = gg Sub + Claw Sharpen. I got swept by that in ubers before. lol
I see that no one thinks my Shedinja is annoying ;_; Ferrothorn is REAL annoying for my Wifi Ubers Team. It's an absolute safe switch in to Shedinja. The only solution is Groudon's Fire Punch, or +4/+6 EQ from Arceus. For the sake of it I added Flamethrower on my Palkia, but it still wasn't working, so I started using Magnezone :X
on PO SpeedBoost Blaziken, Chandelure...JUST DIE ALREADY!!! While I'm playing Leaf Green, Weedle....stop poisoning me jerk....
I mainly battle on smogon where the most annoying thing to have to deal with is reuniclus. Everywhere else I've played I seem to have difficulty with Genesect.
Since Genesect hasn't been released yet, and I'm an avid user of stall, I'd be one to say that Reuniclus is an annoying pokemon to face. I am forced to run both Scizor and Gengar in order to have some sort of insurance against it. And no, Tyranitar isn't a counter, it kills with Focus Blast :[
In UU, Deyoxys-D makes me want to shovel my brain out with a spoon In OU my most annoying pokemon (other than weather inducers or swift swim/dory's) would probably be Zapdos or the Thunder genie. Smething about that typing is extremely hard to counter for me
easily 100% of the time the most annoying pokemon is ditto I will never forgive it for that time I was about to 6-0 my opponent who btw was a complete noob switched in a ditto on my +2 speed +6 attack salamence dragon claw spam gg 0-1
Latios for me...too much speed and power...gets me every time. Also, any Stall mons, I hate them because they never work for me.
Nidoking currently wrecks my Uxie+Drapion "team". It's just too much power for poor Drappy to handle, and I don't have space for Torment. XD Murkrow and Quagsire also slaughter the guy, and Quagsire is amazingly annoying anyways.
My current DW UU team has a huge problem with Lucario. It has has the right typing (both, offensivly and defensivly), just enough speed to outspeed most of my team, and is crazy varsitile. Actually, fighting types in general as a lot of teams that I use tend to be weak against them for some odd reason.