Not saying that DDance Mence is any good, but i'm not sure it's strictly outclassed by Dnite as a flyinium cleaner. Mence main appeal being that it outspeeds scarf Lele after one DDance. Anyway Dnite is kinda trash so that's not saying much.
Now for what brings me here :
Ditto @ Focus Sash
Ability: Imposter
EVs: 248 HP / 8 Atk / 252 Def
Relaxed Nature
IVs: 0 Spe
- Transform
I think sash should get a mention in the other options. Even if it's just to explain that scarf is better most of the time. I've used it with decent success on NU stall and it has definitely qualities in OU too.
I know most people say sash ditto is trash, but you usually hear that after they get reverse swept by this thing. Ditto is mostly played on stall/Semi-Stall teams that happen to be good at keeping hazards off the field. So keeping your sash in MU where you really need it is not that hard.
First this set can actually check lucha : you sack something to the +2 lucha, get ditto in, they acro, you acro and you get your unburden boost to go on a reverse sweep. If rocks are up or if you got any kind of chip on the opposing lucha, this can actually work VS screens :
+2 252+ Atk Hawlucha Acrobatics (110 BP) vs. +1 96 HP / 0 Def Hawlucha through Reflect: 262-310 (81.6 - 96.5%) -- 62.5% chance to OHKO after Stealth Rock
And appart from that, being non choice locked is super nice when copying things like Zard X : When Zard X faces phat, it can often set up, pick a kill and dance around the choice locked ditto, rince repeat. Sash prevents that and will usually pick a surprise kill on the second turn it's in.
Mawile-M is a bit harder to force too set up, but you can go on the same kind of mini-sweep. Part due to the extra turn sash gives you, part due to not being choice locked and being able to surprise sucker punch.
There are obviously ton of other examples : Kommo-O, Kart, Mage, basically most set up sweepers. Which is what ditto is supposed to answer in the first place. Sometime people think about stall like it's gonna keep all of its 6 during the whole match. But stall still win a lot of matches while being down to 4 or even 3 mons. So the threat removal of these mini-sweeps is kind of a big deal i think.
Not to mention sash works VS TR while scarf doesn't.
Last quality of being non choice locked is that you don't need to get your scaf knocked off to start really messing with opposing balance and stall. In these MU you don't need to bluff scarf as much anyway, which is really easy to do in other MU.