Skarm is a cute bird, but with Bax ban it's quite difficult to find a place for it on flying when a wealth of attacking options open are that are no longer limited by their inability to survive boosted ice shard.
Really good glue, rocker, all around somewhat broken mon that is probably the reason for Dragon's continued dominance. Lives +2 EQs and simply sits on a lot of mons from a variety of types. Critical to stop shit like Val, Mane, Meow, phys pult, moon, gambit and pao.
Yes it isn't Bax and doesn't have priority but specs rem is a phenomenal wallbreaker still. Flying is more common now and this thing shits on it almost as much as Bax did. Along with ground poison and water. Last slot on dragon is more free and it's just devastating with specs. Has problems due to speed tier and being hazard weak. Can also run ddance apparently but I think that's just a bad idea. This is my least sure nom but I think it's definitely not a bad pick. And of course you can just load scarf to snipe the rain players on ladder whose entire team dies to freeze dry.
anyways dragon needs a minior counter holy fuck
B --> A (Psychic) 
B --> A (Psychic)
B --> A (Dragon)
C -> B on Water
I think Heatran deserves to be up in S, any team without Heatran is just inferior to those with it, the fire immunity is just too strong let alone the other benefits Heatran brings. More specifically the fact is that it is the only answer to Gouging Fire on the type, a mon that would otherwise win the matchup singlehandedly (Archaludon can beat Gouging Fire, but only if the dragon/fire player is misplaying).
Honestly there is very little reason to be running Excadrill over Iron treads with it's lower speed and inferior bulk, Excadrill hits slightly harder, but I don't think that makes up for it. The oppurtunity cost pushes down the viability down, so I would put this mon in C tier at the very least, probably lower.
Similarly to Excadrill being outclassed by Iron Treads, Empoleon is outclassed as a special wall by Goodra-Hisui, but to a lesser extent. It's utility is in having a pivot move and reliable healing, but i dont feel that benefit outweighs how much bulk you are losing in comparison to Goodra, as well as the power that comes from Goodra being able to come in and kill threats like Greninja, Primarina, and Latios. I think Empoleon should be moved to C tier.
do in Flying for the mirror and for some others?
B ->A on Fire.
D -> B
A -> S
C -> B
B -> C
S -> A
C --> A
(Fighting) C --> B
) , and Sinistcha. You also get a ground immunity so you have a nice switch in to Great Tusk. What holds it back though is that it loses to Pao (but fighting has enough resources to deal with Pao)
(Dark) B --> A
--> S This is an easy S rank, almost as much of a mandatory bring as 
--> B If you choose to run sandless then this guy is the best option for a sturdy physical wall that has good recovery, should be B rank. Quag has some notable other advantages too over mons like Gliscor and Ting-Lu and I don't think there should be this much of a disparity between them. Unaware stops set up sweepers in their tracks, other than Hearthflame, which is something that even the other walls ground has can struggle with. Can deal with things like SD Pao, barring no crash flinches, which other ground walls get completely cooked by. Water/Ground is good for another water/ice neutrality and it doesn't overlap the nasty ice weakness with Lando like Gliscor does. Also allows for freeing up some of Clod's moveslots since they both have access to toxic/rocks/spikes/t-spikes/haze, etc. Hippo existing and the really bad Ogerpon match-up keep it from being better but B rank is accurate.
--> C/B Shocks is one of only 3 strong special attackers that ground has access to and that by itself is a big perk. Also one of the few ground mons that is somewhat fast which will always be valuable. Electric STAB and a strong pivoting move is very helpful generally and especially for bad type match-ups like water and flying. Has access to great support options like rocks/spikes, screens, and even gravity to free up a moveslot for Lando. It's not super popular anymore but Shocks has use cases that other mons can't fulfill with electric STAB and good support options. It doesn't belong among mons like Torterra which is trash, Ursa which doesn't have a use case really, or match-up fishes like Trapinch. Should be B rank because of the options it provides but C is fine because it's not used as much as it was previously.
--> C Feel less strongly about this one but thought I'd mention it. The best slow pivot that ground has access to which makes for a good momentum option on sand teams. Sand otherwise relies on Hippos eject button or potential fast pivoting moves from things like Lando. Pert has decent water STAB, a good utility movepool and defensive typing (except for Ogerpon) as well so I can see C rank. Was used successfully in a tournament recently too. Understand if it doesn't move but I think it's noticeably better than the others with the exception of Shocks. The other D ranks are pretty terrible or useless and it has a role on the most popular type of ground team at least.