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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Iron Moth's top six counters needs 2.45 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.24 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 11:16. No level in this range makes it soloable with a prepared party.

Iron Moth · Elite

firepoison

Weak to

groundrockwaterpsychic

Boss CP: 60,806
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 Iron Moth 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	4(3.07)	4(3.49)	5(4.65)	16:04	6.0
Level 25	3(2.55)	3(2.97)	4(4.00)	13:41	6.0
Level 30	3(2.31)	3(2.67)	4(3.62)	12:18	5.9
Level 35	3(2.26)	3(2.55)	4(3.45)	11:45	5.8
Level 40	3(2.07)	3(2.45)	4(3.24)	11:16	5.7
Level 45	3(2.02)	3(2.37)	4(3.16)	10:55	5.4
Level 50	2(1.97)	3(2.29)	4(3.05)	10:32	5.4

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.

3 trainers at level 40

Landorus (Therian)2.07

A prepared party

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

3 trainers at level 40

Landorus (Therian)2.07
Groudon2.36
Excadrill2.53
Garchomp2.55
Landorus (Incarnate)2.60
Mamoswine2.59

A mixed local group

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

4 trainers at level 40

Mewtwo3.06
Hippowdon3.08
Donphan3.06
Flygon3.17
Torterra3.17
Swampert3.18

The party these numbers assume

1. Landorus (Therian)

Mud Shot + Sandsear Storm

2. Groudon

Mud Shot + Precipice Blades

3. Excadrill

Mud-Slap + Scorching Sands

4. Garchomp

Mud Shot + Earth Power

5. Landorus (Incarnate)

Mud Shot + Earth Power

6. Mamoswine

Mud-Slap + High Horsepower

See the full ranked counter list for Iron Moth · 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.