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 Alolan Golem's top six counters needs 2.68 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.51 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 12:39. No level in this range makes it soloable with a prepared party.

Alolan Golem · Shadow 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	4(3.91)	4(3.92)	6(5.05)	18:32	6.0
Level 25	3(2.96)	4(3.31)	5(4.41)	15:38	6.0
Level 30	3(2.61)	3(2.91)	4(3.86)	13:45	5.9
Level 35	3(2.48)	3(2.78)	4(3.64)	13:08	5.9
Level 40	3(2.41)	3(2.68)	4(3.51)	12:39	5.8
Level 45	3(2.37)	3(2.59)	4(3.38)	12:15	5.7
Level 50	3(2.15)	3(2.51)	4(3.27)	11:51	5.5

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)2.41

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)2.41
Groudon2.50
Excadrill2.68
Garchomp2.74
Rhyperior2.86
Landorus (Incarnate)2.88

A mixed local group

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

4 trainers at level 40

Donphan3.30
Hippowdon3.33
Golem3.32
Flygon3.44
Torterra3.44
Sandaconda3.44

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. Rhyperior

Mud-Slap + Earthquake

6. Landorus (Incarnate)

Mud Shot + Earth Power

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.