Alright here is a team for Mono Ubers I have for Mono Dark.
https://pokepast.es/38987f5d86148736
What this team is about
This team is mainly concentrated on spreading hazards as much as we can and trying to do well vs our super effective MUs (Bug, Fighting and Fairy) with screens. With one screen setter, one hazard stacker, two choiced mons and two set up mons.
Explaining how this team works

Ting Lu
This Pokemon is the best hazard spreader by default thanks to it's amazing bulk. Note the fact that it is mainly an Anti-Fairy or more like Anti-Zacian Pokemon. Thank God Zacian-Crowned is banned but not Zacian. and Mono Fairy teams do run RIbombee + Zacian pair which can sweep us (Maybe Kingambit takes a hit). So we run Roseli Berry to talk half damage from those Play Rough and immediately use Whirlwind on them. By this, we get rid of Intrepid Sword from being boosted. Live a Fairy move and hit back with Heavy Slam on idiots like Flutter Mane (easy OHKO), Hatterene (2HKO but you win) and Iron Valiant (2HKO, 50/50 winrate, maybe OHKO after hazards)

Sableye
Every Mono dark team would run a bulky sableye with will o wisp, recover, knock off and encore if they include it. Here, we made it different. We got screens here paired with encore and will o wisp. It is mainly to use will o wisp on dangerous physical attackers and to make Moltres-Galar and Kingambit to work better. It also gets a Fighting and Normal immunity which means it is an easy Fighting move switch-in and also a spin blocker.

Meowscarada
Everyone runs Choice Scarf Meowscarada because of the speed and I understand that, but Choice Band Meowscarada is a treasure imo. You are able to 2HKO Skarmory and Corviknight (a good chip) with Thunder Punch. Flower Trick OHKOs Ogerpon-W and Excadrill. Knock Off also hits hard on some mons. Triple Axel is also good vs Dragon (out of Archaludon) and OHKOs Ogerpon-H which also is vital. It also can combat well with Water stall considering you have both Flower Trick and Thunder Punch.

Greninja
Since Meowscarada has Choice Band, Greninja has Choice Scarf. I planned having Chien Pao as the scarfer. In fact, it was in the team previously. Later I found some bulky pokemon from each team being annoying by their bulk and Fairy type pokemon being problematic so I gave this Pokemon Switcheroo. Scarf lets us out speed speed-boosted quark drive iron Valiant and we can beat it with sludge wave at the first place. You can then use Switcheroo on annoying Pokemon like Toxapex, Corviknight, Skarmory, Alomomola, Gliscor, Fat Volcarona, etc. And Greninja, as mentioned above gets Switcheroo where Chien Pao does not.

Moltres-Galar
This Pokemon is what saves you from Bug and FIghting teams. Here, if you successfully set up with Moltres-Galar with the help provided by Sableye, you win Bug ggs. But on Fighting, there are Pokemon like Iron Hands and Zamazenta-Crowned who can live many Air Slash thanks to their bulk. So the plan is that you can try tricking scarf on Iron Hands and for Zamazenta-C, just switch to Sableye and do your thing.

Kingambit
Sableye fainted, Ting Lu fainted, Meowscarada fainted, Greninja fainted, Moltres-Galar fainted.............
Kingambit joins the chat
Kingambit's Supreme Overlord!
Yeah this guy is my favourite Pokemon and has a use in reversing sweeping teams. It destroys a lot of bulky Pokemon and it is an amazing wall breaker. This is the Pokemon who can do well on your Bug and Fairy MUs. Each move from this guy hits so hard at +2 Fallen: 5 + Black Glasses. Black Glasses is to further increase the power of Sucker Punch. It is easily a better Bisharp with its higher power and defense. Along with Meowscarada, Kingambit also aids in to break stall. With screens provided by Sableye and if the opponent is a physical attacker and is burned, Kingambit easily makes a Swords Dance or two and can further head to destroy the opponent. Be careful and aware of Pokemon who tries to use will o wisp or trick/switcheroo on Kingambit and aim at beating those with other pokemon first.
Replays:-
I will try gathering replays from tours asap.