Hey all just chiming in with a bulky Garchomp sweeper set:

Garchomp @ Leftovers
Ability: Rough Skin
EVs: 172 HP / 20 Atk / 64 SpD / 252 Spe
Jolly Nature
- Earthquake
- Rock Slide / Scale shot
- Substitute
- Swords Dance
172 HP investment gives it 400 total HP, which is divisible by 16 for a leftovers number. Also has enough bulk for its substitute to survive non-Stab uturns from Pokémon with attack as high as bulky landorus. 188 investment cangive it 101 HP subs for blissey if that’s your concern. 20 Atk is enough to KO toxapex at +2. 64 SpD rounds it off, giving it a great matchup against the current all-star SpA crowd, and super importantly, Garchomp can literally break through clefable/fini teams with ease.
even with 252 Atk, at +2, Garchomp only 2HKOs clefable and fini. This bulky set keeps the 2HKO whilst taking much less back. As anybody who’s been swept by a Garchomp would know.. a Garchomp with 50% HP is dangerous. If they have a fast revenger, just take Garchomp out and bring it back in.
Koko can’t KO either, of course, with its paltry base 80 STAB, whilst lele needs a boosting item to OHKO, as the scarf set can’t revenge it if Garchomp is healthy, unless the lele is modest of course.

And

v.

0 SpA Clefable / Tapu Moonblast vs. 172 HP / 64 SpD Garchomp: 210-248 (52.5 - 62%) -- 98.4% chance to 2HKO after Leftovers recovery

v.
252 SpA Tapu Koko Dazzling Gleam vs. 172 HP / 64 SpD Garchomp: 224-266 (56 - 66.5%) -- guaranteed 2HKO after Leftovers recovery

v.

252 SpA Tapu Lele Moonblast vs. 172 HP / 64 SpD Garchomp: 332-392 (83 - 98%) -- guaranteed 2HKO after Leftovers recovery
rock slide is preferred over scale shot due to being able to reliably hit the entire metagame, and not having to worry about mind games from STABs with immunities, or defense drops sacrificing your bulk.
the lack of scale shot really sucks if you want to sweep faster teams, but what excels a this Garchomp is forcing KOs on bulky Pokémon whilst keeping Garchomp healthy enough to check critical threats like choice locked blacephalon and magma storm heatran.
The substitutes are really bulky and have a chance to survive STAB scalds from almost every defensive Pokémon. Toxapex can’t break it at all.
Unfortunately the slowbro teleport or landorus u turn pivot to triple axel Weavile or infiltrator dragapult sucks, so just keep that in mind against those teams.
get all the benefits of the shitty roseli berry set without any of the cons. And lots more bulk to use this hulk as an offensive/defensive mix.