Short answer: No
Long answer: NOOOO!
+3 252+ Atk Zacian-Crowned Behemoth Blade vs. 252 HP / 252+ Def Wobbuffet: 547-645 (93.6 - 110.4%) -- guaranteed OHKO after Stealth Rock
+1 252+ Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 252 HP / 252+ Def Wobbuffet: 536-632 (91.7 - 108.2%) -- guaranteed OHKO after Stealth Rock
252 SpA Calyrex-Shadow Max Phantasm vs. 252 HP / 252+ SpD Wobbuffet: 546-644 (93.4 - 110.2%) -- guaranteed OHKO after Stealth Rock
252+ SpA Life Orb Dark Aura Yveltal Max Darkness vs. 252 HP / 252+ SpD Wobbuffet: 814-959 (139.3 - 164.2%) -- guaranteed OHKO
There are tons of Pokemon that just destroy Wobbuffet. It doesn't get anything to remove Stealth Rocks, so basically set-up rocks (sacrificing NDM isn't bad, it's getting sacrificed for good reason LOL) then send in Calyrex-Shadow, and watch sweep. Plus, what made you think that beating an opponent of lower than 1400 ELO made you confident that this gonna help you peak AG ladder?
RCM889's rating: 1000 → 1048
(+48 for winning)
ArthurMeir YT's rating: 1073 → 1047
(-26 for losing)
"1073". Definitely the lowest ladder. Anything works there, even 6 Smeargle have potential to wipe the ladder. So, defeating an opponent of 1073 ELO shouldn't make you confident that it gonna work.
Also, Substitute exists. You can't do anything if they Substitute, you can try Encore but since 6 Wobbuffet have no synergy at all, after Encore ends it's pretty much the end of you. There's also Special Sweeper Yveltal, which you can't touch at all. Since Wobbuffet's Mirror Coat has no work on a dark-type Pokemon like Yveltal, getting Stealth Rocks to disable Focus Sash or having Taunt Yveltal means ggwp for you.
All in all, it's some tech to bully low ladder. In higher ladder, this strategy just pales against everything so you shouldn't use it at all.
Hope this helps!
