@Snowy Amine ( MC Kapper) It looks ok, but it's pretty lacking in some areas. For one, the lack of Stealth Rock gives your opponent more room to switch in and out, especially when their type is weak to Stealth Rocks. So, I advise you to run Stealth Rocks on Tyranitar, over Dragon Dance since, truth be told, Tyranitar's not a great user of it. Then, if you don't plan on running Mega Charizard X ever, then Earthquake is a far better physical coverage option. If you do want to run Mega Charizard X, having Flare Blitz over Heat Wave would be better, since both Mega Charizard X and Mega Charizard Y can take advantage of it. In that case, you could just replace Solar Beam with Flare Blitz, since Mega Charizard X makes no use of it at all. Then, speaking of Meloetta: it's better to run only one kind of Meloetta. You could go for a special set, maybe even with Calm Mind, or go for a physical Pirouette-form set, with Relic Song, and dual STAB, because in this state, Pirouettte only really gets one usable move, while Aria will be forced to change forms after using its normal STAB. I advise you to run Aria, since you already have good physical attackers, and with Trick Room, since your team's speed is mostly low and that can help you get around that. Moving on to Scizor: I only suggest a small change here: since it's a Defog set, you'd be better off with Roost over Knock Off, since that'll give you regular recovery, and you'll still be able to reliably deal damage with Bullet Punch and U-Turn (if you prefer an offensive Scizor build for some matches, you could give it a Choice Band). Also make it shiny. Finally, I think your team kinda lacks some synergy. In my opinion, you could either replace Scizor with Excadrill, that becomes extremely threatening under Tyranitar's sand AND has Rapid Spin, or replace Tyranitar with, say, Pelipper, that helps even more with your team's weakness to fire, gets Wide Guard (which is very good for team support in Doubles and Triples), and even has reliable recovery.
@blackicemanuI think your team is pretty good as it is, but I'd put either Sucker Punch or Roost over Brave Bird on Decidueye. Brave Bird doesn't give you that much of a benefit, and while with Sucker Punch you'd get some priority and get the upper hand on faster threats, with Roost you get a reliable form of recovery, which is great for a mon like Decidueye that can run some extra bulk effectively. Especially in your team's case, since neither Volcarona nor Alolan Ninetales really appreciate Stealth Rocks. Also, Mega Medicham doesn't really need both Ice Punch and Thunder Punch. You should change the latter to Bullet Punch, as that'll give Medicham good priority that won't be reliant on you switching in and out.
@YinYang9705I think it looks decent, yet pretty one-dimensional. Bulk Up Incineroar is interesting, but not very reliable, since it's pretty slow and its special bulk is good, but not great. Not to mention that you already have two physical setup sweepers in your team. So I suggest that you replace it with U-turn, which makes it a pretty good pivot, along with Intimidate. Furthermore, Earthquake is noticeably better than Cross Chop as an offensive option, due to its ability to hit multiple targets and perfect accuracy. Speaking of multiple targets, your team could really use a Wide Guard setter. In fact, I think Registeel should be replaced with Gigalith. With this, you can have some control over weather, Stealth Rocks (although Registeel can run those), and Wide Guard. It's a surprisingly good supporter. It's not as sturdy as Registeel, but it's better suited for your team. Finally, I think Bewear and Incineroar is too redundant, even if the latter doesn't run setup. I suggest Garchomp over Bewear. More precisely, Garchomp with Fire Blast, Rock Slide, Dragon Tail and Earthquake. It is a pretty drastic change, but Garchomp can fullfill a plethora of roles on your team. It is a good pair for Gigalith, since regular Garchomp can cheat luck under the sand with Brightpowder + Sand Veil, and Mega Garchomp gets a pretty big power boost for its Rock Slides and Earthquakes. You can even run Rough Skin + Rocky Helmet if you still need a good physical wall. Fire Blast is a good form of coverage for it, as it deals with physically bulkier threats such as Chesnaught, Scizor and Ferrothorn, so you won't have to rely solely on Incineroar for that, Dragon Tail can stop setup and help stack up Stealth Rock damage. Rock Slide is the best coverage it gets, especially in Doubles and Triples, and even gets the Sand Force boost, and Earthquale is, obviously, its most reliable STAB. Garchomp can help this team a lot. Though I understand if you think Garchomp is too meta. Still, it's a good choice.
Holy FUCK this was long.