Group size estimator

How many trainers do I need to invite?

The Estimator is already "trainers of this attacker needed to finish inside the timer", so this page does not invent a number: it reads it off the boss's own ranked counter list for three realistic parties and re-simulates each of them at every level from 20 to 50.

Raid bossTierIVsWeatherFriendshipDodgingShadow attackersMega attackersLegendary attackers

Invite 5 to be safe — 4 if everyone is prepared

At level 40, a party of Archaludon's top six counters needs 3.79 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.84 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 17:26. No level in this range makes it soloable with a prepared party.

Archaludon · Elite

steeldragon

Weak to

fightingground

Boss CP: 56,836
Boss HP: 20,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Archaludon at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time	Faints per timer
Level 20	5(4.91)	7(6.14)	8(7.97)	28:16	6.0
Level 25	5(4.16)	6(5.06)	7(6.32)	23:17	6.0
Level 30	4(3.37)	5(4.33)	6(5.35)	19:57	6.0
Level 35	4(3.30)	5(4.12)	6(5.02)	18:57	6.0
Level 40	4(3.14)	4(3.79)	5(4.84)	17:26	6.0
Level 45	4(3.07)	4(3.66)	5(4.63)	16:51	6.0
Level 50	4(3.03)	4(3.53)	5(4.44)	16:16	6.0

Whole trainers in bold, the raw estimator in brackets — 2.04 means two trainers is right on the line and three is comfortable.

Six of the best counter

Every trainer brings six copies of the single best counter — the theoretical floor.

4 trainers at level 40

Keldeo3.14

A prepared party

Each trainer brings the boss's top six counters, powered up and correctly TM'd.

4 trainers at level 40

Keldeo3.14
Lucario3.66
Terrakion3.73
Landorus (Therian)3.86
Blaziken4.12
Kartana4.22

A mixed local group

Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.

5 trainers at level 40

Groudon4.58
Marshadow4.64
Latios4.74
Raikou4.83
Machamp4.83
Landorus (Incarnate)4.87

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Lucario

Force Palm + Aura Sphere

3. Terrakion

Double Kick + Sacred Sword

4. Landorus (Therian)

Mud Shot + Sandsear Storm

5. Blaziken

Counter + Aura Sphere

6. Kartana

Fury Cutter + Sacred Sword

See the full ranked counter list for Archaludon · check a real lobby (win chance, who brings what) · make a share card of the top six

How this is worked out

The boss is ranked once at level 40 with rankCached (the same memoised call /raids makes), then the three bands — rank 1, ranks 1-6, ranks 13-24 — are re-simulated at each attacker level with an 8-run Monte Carlo each. Holding the party fixed and moving only its level is deliberate: it answers "what if my party were level 20" rather than "what would a level-20 player's completely different party be", and it is about ten times cheaper than re-ranking every attacker seven times. The Estimator itself is Pokebattler's definition, time to win including rejoin time divided by the raid timer.