Please, for Aruseus' sake, Stop calling things like Somersault and certain Pokemon sets (especially overspecialized ones like a Goku with 2 Fire moves) counters. If it were that simple it would've been allowed, but as it stands, Wobbuffet requires your ENTIRE team to have Beautiful Skin, Baton Pass, Teleport or Somersault (or something I missed) to actually switch into it. If it can't do that, it's not a counter.
Baton Pass requires another Pokemon that can actually scare Wobbuffet.
Crescent Dance requires another Pokemon that can actually scare Wobbuffet. Let's kill your own Pokemon to get in something else. Works once, but doesn't really hurt Wobbuffet in any way.
Explosion/Self Destruct If Explosion/Selfdestruct was a counter to anything, Metagross would be a Suicune counter. But it's not.
Houndoom/Sabelye/Mikaruge. (2/3 are immune to both, Houndoom attacks special and is immune to Mirror Coat). Pursuit now hits Wobbuffet physical, he will just switch out and come back later to kill something else, or kill with Counter.
Taunt: Doesn't affect counter/mirror coat, but stops Destiny Bond/Encore. oh I guess you'll have to use 5 Taunters and a Houndoom then
Torment? (Well they can't always use counter/mirror coat, even though they want to after encore). Wobbuffet Encores Torment and you're going to get buttfucked. Usually Wobbuffet's attacking sequence is Encore/counterattack anyway, followed by a switch.
Excuse me in saying this, but isn't the sole reason Wobbuffet was thrown into 00bers was because a Wobby vs Wobby is stalemate?
If its true Shadowtag negates itself there really should not be any reason to keep it banned.
It's clearly not the only reason, as you may have noticed when reading this thread
it just seems like a huge waste to me. in GSC, wobbuffet was beyond even a joke pokemon, as it could do absolutely NOTHING. then gamefreak decided to make it usable, and it's immediately banned because people don't feel like fighting it, even though no one ever thinks of banning hp zapdos/cm suicune/cm raikou/curselax. the thing is, all of those are perfectly legal and should be allowed, just like wobbuffet.
What Wobbuffet was in GSC isn't relevant for Advance at all. Magneton and Dugtrio were dumb shitheads in GSC and are really powerful now. Wobbuffet just goes one step further and goes from neverused to broken.
People have thought of banning HP legends, Justin actually did it for an entire Smogon Tour system. From what he says it becomes a more stale metagame with lots of walling and stalling. In other words, it makes the game less fun. Wobbuffet essentially does the same but to an even worse extent.
Curselax and all these other things are also not uncounterable by definition. Wobbuffet is. DP gives you a few more options, but you have to put one of them on every single of your Pokemon to avoid Wobbuffet killing even one of your comrades.
Also while I personally detest Dugtrio, it creates balance, while Wobbuffet makes the metagame centralized. Dugtrio kills tons of Pokemon that are used world-wide to avoid them from being broken. Wobbuffet himself is pretty broken and counters about everything except those few with Taunt, Baton Pass, etc. Do you really want to make Baton Pass teams and Taunt Gyarados/Tyranitar to be even more usable?