Aron @ Berry Juice
Ability: Sturdy
Level: 1
Mild Nature
- Toxic
- Endeavor
- Protect
- Sandstorm
 
This is a level 1 Aron, whose presence entices most stuff that isn't mono-Poison-attacking to try to kill it instead of doing anything funny.
It's not perfectly reliable at this, but it's pretty rare and the team plays fast enough that you can probably retry when you're just aiming for 50.
 
It is technically optimal for this to be in the left slot so that you can scout for Magnet Pull on Magnezone and Probopass by trying to switch out without committing. This will never come up because why would it matter whether it's Magnet Pull or possibly Sturdy, you don't care either way.
 
Since people keep asking, Berry Juice is in fact better than Shell Bell, because the situations where Shell Bell does "more" than Berry Juice are the ones where you're already in a winning position, whereas Juice does more for you in narrow games.
 
Sandstorm is definitely the least-clicked move. I've run Rain Dance here on the Jellicent variant, but otherwise the team doesn't really benefit from it. Other "popular" options for that moveslot include Spite and Swagger, but it's going to be the least clicked move by far either way.

Aromatisse @ Lum Berry
Ability: Healer
EVs: 252 HP / 252 Def / 4 SpA
Relaxed Nature
IVs: 1 Spe
- Odor Sleuth
- Dazzling Gleam
- Trick Room
- Moonblast
 
Aromatisse's key advantage over Dusclops, the other TR setter with Foresight/Odor Sleuth, is that it has an actually decently strong completely unresisted spread otion in Dazzling Gleam. This gives the Aromatisse/Aron frontrow significantly better 4-0 capability, since it's frequently possible to have Aromatisse kill something on the side over 3-5 Gleams without having to land an Endeavor on it.
 
(Notably, Evelyn's Latios1 at 50 can be handled this way, and can easily be stalled out of Luster Purge by sacking the backups, which renders it utterly incapable of touching Aromatisse, saving you from Lax Incense hax.)
 
Doubling up on STAB with Moonblast looks weird, but that slot is always going to be the least-selected move, and you want *something* stronger than Dazzling Gleam to pick up the kill on stuff like Sitrus Mold Breaker Rampardos4. We go megarelaxed because it gives us ~90% to live Tyrantrum4's Head Smash and get off Trick Room anyway.
 
Aroma Veil is normally also a selling point for Aromatisse, but for the purpose of going to 50 with an Aron team, it's shockingly irrelevant because stuff rarely actually *tries* to Taunt Aromatisse, so the tiny chance that Healer undoes a side-effect burn/para on Aron might actually be more relevant. In any case, our decision is likely made for us nowadays anyway by the fact that Aroma Veil is Safari-only.

Kangaskhan @ Kangaskhanite
Ability: Scrappy
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Sucker Punch
- Fake Out
- Double-Edge
- Power-Up Punch 
 
This is just a pretty generic Mega Kangaskhan; the set isn't even particularly optimal, The key here is really just that it's a generically strong priority user. I used to have Gale Wings Talonflame in this slot but that's Safari-only so pretty inaccessible these days if you don't already have one.
Other options in this slot include things like Aegislash and Mawile. Frankly, anything vaguely competent is fine in this slot in the Maison, since the frontline carries pretty hard and you just need generic competence for when TR somehow doesn't go up (read: Rock Slide flinch) or Aron can't stay out (usually hail exactly), and anything will do for 3v1 cleanup.
 
It's pretty safe to replace this slot in battle 50, since Aron + Aromatisse does a pretty good job of handling Evelyn with just the frontrow.

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 228 HP / 4 Atk / 4 Def / 252 SpD / 20 Spe
Careful Nature
- Toxic
- Protect
- Bulldoze
- Substitute
 
This is just my third-favorite singles Gliscor set. It handles blind 1v1s pretty well, I guess. This isn't actually even a good choice in doubles, but I've run singles Aegislash + singles Gliscor as filler backups on this team to cut corners on actually training extra mons so I know it's Fine lol, this is just Bulldoze Gliscor propaganda.
 
You can replace this slot in battle 50 too.