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 2 to be safe — 2 if everyone is prepared

At level 40, a party of Alolan Golem's top six counters needs 1.50 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.97 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 6:55. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Alolan Golem · Tier 5

rockelectric

Weak to

groundfightingwatergrass

Boss CP: 40,396
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Alolan Golem 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	3(2.01)	3(2.11)	3(2.85)	9:43	6.0
Level 25	2(1.65)	2(1.84)	3(2.42)	8:29	5.9
Level 30	2(1.48)	2(1.65)	3(2.18)	7:36	5.7
Level 35	2(1.40)	2(1.58)	3(2.06)	7:17	5.5
Level 40	2(1.32)	2(1.50)	2(1.97)	6:55	5.4
Level 45	2(1.24)	2(1.44)	2(1.90)	6:37	5.1
Level 50	2(1.22)	2(1.40)	2(1.83)	6:26	5.0

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.

2 trainers at level 40

Landorus (Therian)1.32

A prepared party

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

2 trainers at level 40

Landorus (Therian)1.32
Groudon1.40
Excadrill1.51
Garchomp1.57
Mamoswine1.62
Rhyperior1.61

A mixed local group

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

2 trainers at level 40

Mudsdale1.83
Golem1.88
Hippowdon1.91
Flygon1.93
Torterra1.92
Sandaconda1.92

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. Mamoswine

Mud-Slap + High Horsepower

6. Rhyperior

Mud-Slap + Earthquake

See the full ranked counter list for Alolan Golem · 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.