For someone like me who loves using uncommon picks on teams, you are my hero, sir. xD I've been loving the stuff you've been playing around with. I plan to make a few of these myself (possibly the Victreebel soon too, since I recently saw its Shiny and REALLY want one).I've posted about victreebel once before, but I've tinkered with his set and learned some more of the calcs.
It's actually an extremely strong priority user that has access to a sleep move, a STAB base-120 move, and Swords Dance. In effect, it makes for a pokemon that can carve through a team and punish anyone who predicts incorrectly.
I don't have many replays of it being shut down (the times it happened were usually because I made a needlessly risky play). I do have some really cool sweeps (or semi-sweeps) with it. Even skilled players fall victim to it - once set up, killing it requires a correct prediction or a pokemon gets dented, KO'd, or slept.
Melmetal and Dragonite were the two things that could consistently check it, and power whip would even dent those pretty badly. If you see it in the wild, I'd recommend using Dragonite to check it - he can roost off the sucker punch damage and resists the power whip.
That said, I've been finding this game's meta really fun, tbh. Given the very limited selection of Pokemon compared to even just the last couple generations, it's strangely enjoyable.