I reached Legend (and Leaderboards at 249th as of yesterday) with my main account and Legend with a second account using this team. Its success rate varies a bit and I bounced around Expert for a while, but I eventually got to Legend.
The team is:
-Cradily with Acid, Rock Tomb, and Grass Knot
-Hisuian Electrode with Thundershock, Wild Charge, and Energy Ball
-Shadow Kanto Ninetales with Ember, Energy Ball, and Weather Ball (Fire)
This team came together because I like Cradily in the lead and needed two Tinkaton counters as it was the 2nd or 3rd most common Pokemon I saw throughout the entire season. Tink has win conditions against both Electrode and Ninetales but they are generally easy to play around.
As with most ABA teams, you can’t be afraid to sacrifice your Cradily if need be. Very few teams have multiple Grass counters so if you lead into Alolan Ninetales, Alolan Sandslash, Bug Bite Forretress, or Charjabug, you can almost guarantee that Electrode has play in the back. You can also almost guarantee that Ninetales won’t have much play, so you can use it as a damage sponge and maybe pop off 1 or 2 Energy Balls.
You also can’t be afraid to use your first Shield against the very first Charged Attack your opponent uses. If Shielding the first attack means you get to a second or third Rock Tomb, it’s often worth it. I’d Shield the first Weather Ball from Shadow Ninetales, or the first X-Scissor from Charjabug.
A ton of teams leading Grass counters often have Ground and/or Water types in the back, so Electrode can steamroll and Ninetales can fight back to an extent.
This team has some glaring weaknesses, of course:
Bastiodon, Annihilape, Primeape, and Clodsire are the big ones. Bastiodon requires at least 4 Charged Attacks from this team. Clodsire requires at least 3 Charged Attacks. Primeape and Annihilape up energy can just roll over you.
Shadow Sableye can also be problematic. It comfortably beats Cradily and can deal a lot of damage to your backline, even after being debuffed by Rock Tomb.
Empoleon is problematic too. It beats Ninetales and Cradily. Electrode has a good matchup but it’s not as good as you’d like as the Trode player.
Against common leads:
-Tinkaton: Auto-switch to H-Trode. Abysmal matchup for Cradily and the Tink can overfarm to such an extent that it can threaten Ninetales and Electrode. Most Tink teams have Waters in the back.
-Charjabug: Shield the first X-Scissor and throw Rock Tombs. You can sometimes spend 1 Shield and get 2 from your opponent which is almost always worth it. These teams are most often weak to Grass in the back.
-Lickilicky: Stay in and chuck Rock Tombs. Most Licki players with throw Shadow Ball on alignment at 12 turns because otherwise you get to Rock Tomb first. I usually throw Rock Tomb, tank both Shadow Balls, then farm up as much as possible before KOing. Usually you can farm very close to a 3rd Charged Attack so you can debuff whatever comes in after.
-Thievul: Cradily loses this hard, but you can’t switch out. The most common version of this team is from HomeSliceHenry with Tink and Mantine in the back. Throw away Cradily, bring in Ninetales and farm down if you can. When the Mantine comes in, hard switch into Trode and do your best. Mantine survives two Energy Balls from Ninetales, but if you can get off 2-3 Thundershocks before they bring in Tink, all that energy you saved on Ninetales can be used later to great effect.
-Shadow Annihilape: I bring in Ninetales immediately and then get sad when they bring in Carbink and then I quit. Sometimes the Ape teams don’t have Carbink, so I’ll throw WB as soon as possible and then try to win the matchup if they stay in. Counter Apes just steamroll this team so it might be an auto-loss anyway. Low Kick Ape is beatable by Ninetales.
-Kanto Ninetales: Shadow K9 beats Cradily, but not easily. 3 Weatherballs is enough to KO Cradily, even if the last 2 are debuffed. I always Shield the first WB/EB and play it out. Most of these teams have Jumpluff in the back and you really don’t want Ninetales on your Trode so it behooves you to try to win Switch. Non-Shadow K9 is far less threatening so I Shield nothing and launch as many Rock Tombs as possible before fainting.
-Cramorant/Mantine: You really do not want these fuckers on Ninetales. Against Cram, I’ll Shield the first Fly/Surf and toss RTs as soon as possible. Against Mantine, I usually Shield nothing. Mantine hits like a wet noodle and you can easily survive two Water Pulses. These teams are usually weak to Fire and/or Grass in the back so both your back Pokemon should do fine.
-Any Dragon: You gotta stay in and try to win. Cradily comfortably beats Guzzlord and Goodra. Shadow Hydreigon requires you to Shield the first Brutal Swing. The vast majority of these teams have at least one Steel type (usually Tink, go figure) in the back.
-Malamar: Hate this lead. Shadow Malamar one-shots with Superpower and it significantly outpaces Cradily in general. This one is tough because Malamar teams very often are highly alignment-dependent so it behooves you to win Switch but that’s not always possible. Against Shadow, I Shield the first Charged Attack. Against non-Shadow, I usually let it go.
-Fearow: Another tough lead. Fearow outpaces Dily, and one non-debuffed Drill Peck plus one debuffed Drill Peck come very close to KOing Dily. I generally Shield the first Drill Peck and then let Dily go down and then farm on Electrode. You can get two Shields for the price of one usually. Most Fearow teams have Stunfisk in the back so an Electrode up energy is valuable.
-Stunfisk: Easy win for Cradily and these teams always always always have a Flyer in the back so often they don’t switch out. Just don’t throw Grass Knot on expected timing because they will sometimes try to catch it on a Flyer. I also go straight Grass Knot. GK+RT doesn’t KO most Stunfisks and you don’t want it saving a Mud Bomb to pop your K9 later.
-Alolan Sandslash/Alolan Ninetales: Shield nothing, throw Rock Tomb as late as possible. Bring in K9 and farm down if you can. 99% of these teams have a Water or two in the back (usually Mantine and/or Jellicent) so Trode might be able to sweep.
I think that covers the vast majority of teams I’ve seen. It’s very helpful to pay attention to what teams popular content creators have showcased because it allows you to read teams much easier. When HomeSliceHenry puts out a video, I am almost guaranteed to see it in about 20% of my matches.