This battle.
A classic example of how the entire match boiled down to coinflips. I ended up sweeping him clean with Lum DD Zygarde, but just look at what happened to all my Pokemon before it. And even then, Zygarde only pulled through with the same miraculous luck that Klefki got to take out 3 of my dudes. Hardly any / no skill was needed from both players at all.
With priority Swagger, being able to consistently apply this kind of hax to turn the whole battle into a luckfest is what makes Prankster SwagPlay teams highly uncompetitive. Whoever has greater control over this hax is up for debate (Swag teams have Foul Play and usually use Ditto to keep lucky physical sweepers in check, other teams use bulky shit like Chansey and Gliscor). Granted, Prankster Swagger by itself is not very cheap at all, but it just so happens that nearly every Swagger user has something that can help stack the hax and / or take full advantage of it.
As
Lee said, Prankster Swagger is just likely to get caught in the crossfire between all the infuriating "strategies" (aka copypasted movesets). Lee suggested
a couple of potential bans, but I'm not particularly sure if choosing
just one of these bans is enough to get down to the root of the issue instead of applying several complex bans at once / an
even more complex ban. The core annoyance "strategy" of these Prankster Swagger users can still remain intact (for the most part) if we only choose one of the bans because most of the Prankster Swaggerers have enough moves to dick around with so long as Prankster Swagger remains usable. After all, if only one ban is implemented, the Swagger users can usually still use ~2 / 3 moves out of the ~3 / 4 moves that inherently make them as big a deal as they became in the first place:
- Thundurus-I can still attack or use those free turns to set up with Nasty Plot;
relatively unaffected by any of the bans
- Sableye does not like losing out on STAB Foul Play, but can still use Night Shade to fight back;
only really affected by Foul Play ban
- Klefki, Liepard, Murkrow and Purrloin are only truly neutered if they lose both Foul Play
and Thunder Wave alongside Swagger, while Klefki still has the typing (and to an extent, bulk) to go Swaggering without Sub anyway, otherwise they can still do SubSwagger, Prankster paraSwagger, and of course SwagPlay;
needs more than one ban
- Whimsicott is an odd case, since it has Stun Spore over T-Wave (less accurate but nabs Ground-type dudes), and it has the infamous SubSeed combo, which alongside Swagger may be as equally infuriating to deal with as SwagPlay itself, since it boasts the ability to pressure Chansey;
affected mostly by Substitute ban
So either a super complex ban of Prankster Swagger + all the aforementioned moves (Thundurus-I would still be at large though), or just banning Prankster Swagger itself. This is looking like the endless battle clause: do we ban
Leppa Berry Prankster Swagger, or do we ban all the moves that makes
Leppa Berry Prankster Swagger a dick move? The problem with Prankster Swagger is that there are a lot more moves that would accompany Swagger in the complex ban, and I'm not sure if that's totally feasible / practical.