I have tried this set I crafted
Breloom @ Toxic Orb
Ability: Poison Heal
Tera Type: Fighting
EVs: 240 HP / 252 Atk / 16 Def
Adamant Nature
- Focus Punch
- Seed Bomb
- Spore
- Substitute
I used it on a stall team, you basically don't give a shit about Orthworm leads, it gets hard walled by ghost, but on a stall team you probably have Gholdengo, so you can hit it with that, 240 HP hits a magic PH and sub recovery number, the rest in def because why not
it's very 50/50, but it works
N E U R O N
A C T I V A T O N
I have talked about my opinions before, so I'll just talk about Kingambit, who seems to be the new King of the hill.
1) it runs only 1 set, stuff like low kick, tera blast are for cheese cooking, but can throw you up
2) +2 can destroy most things, especially with Supreme Overlord, just like Houndstone in the early days of the meta, it punishes you for winning, just 3 mons dead makes Dondozo go from counter to check because Unaware IS AWARE of SO
3) It forces mind games with Sucker Punch, making most ways to approach it 50/50
4) The true innovations come from the combination of Tera and Items, Fire/Flying/Ghost/Grass/Ground/Dark + Lum Berry/Boots/Leftovers/Metal Coat/Black Glasses/ or even forgo sd and take choice band/AV
5) While bulky, due to the meta filled with ground, fighting, fire types + sun, and Garganacl can punish him for trying to enter, the meta is naturally hostile towards it in various way, forcing gambit to tera if it wants to tera, this could make the kingambit player force himself into an obvious sacrifice
6) People are so afraid of it that they are doing speed creep wars with mons like rotom and skeledirge, in my personal opinion, I find this to be dumb, because you're cutting eves from somewhere else more important, on both sides, and your matchup against offense doesn't really improve
Kingambit is good, really good, but it can be managed due to the natural coverage and meta defining mons around it
Besides, once HOME rolls around, we are gonna get the single biggest Kingambit counter in the game
that's right, I'm talking about

WOOOOOOOOOOOOOOOOOOOOOO (calcs done with Rocky Helmet)
+2 252+ Atk Kingambit Iron Head vs. 252 HP / 228+ Def Chesnaught: 189-223 (49.7 - 58.6%) -- 99.6% chance to 2HKO
+2 252+ Atk Kingambit Kowtow Cleave vs. 252 HP / 228+ Def Chesnaught: 100-118 (26.3 - 31%) -- guaranteed 4HKO
+2 252+ Atk Kingambit Sucker Punch vs. 252 HP / 228+ Def Chesnaught: 82-97 (21.5 - 25.5%) -- 0.8% chance to 4HKO
0 Atk Chesnaught Drain Punch vs. 112 HP / 0 Def Kingambit: 300-352 (81.3 - 95.3%) -- guaranteed 2HKO