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 Mega Crabominable's top six counters needs 2.74 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.49 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 12:44. No level in this range makes it soloable with a prepared party.

Mega Crabominable · Mega Legendary

fightingice

Weak to

fightingflyingsteelfirepsychicfairy

Boss CP: 63,645
Boss HP: 22,500
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Crabominable 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(3.39)	5(4.09)	6(5.15)	19:01	6.0
Level 25	4(3.08)	4(3.41)	5(4.41)	15:51	6.0
Level 30	3(2.67)	3(3.00)	4(3.88)	13:56	6.0
Level 35	3(2.57)	3(2.84)	4(3.63)	13:12	6.0
Level 40	3(2.49)	3(2.74)	4(3.49)	12:44	6.0
Level 45	3(2.43)	3(2.64)	4(3.37)	12:16	6.0
Level 50	3(2.27)	3(2.52)	4(3.27)	11:42	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.

3 trainers at level 40

Zamazenta (Crowned Shield)2.49

A prepared party

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

3 trainers at level 40

Zamazenta (Crowned Shield)2.49
Zacian (Crowned Sword)2.53
Necrozma (Dusk Mane)2.57
Keldeo2.79
Mewtwo3.00
Rayquaza3.04

A mixed local group

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

4 trainers at level 40

Galarian Zapdos3.38
Tapu Lele3.41
Galarian Articuno3.41
Moltres3.46
Enamorus (Therian)3.45
Blaziken3.49

The party these numbers assume

1. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

2. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

3. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

4. Keldeo

Low Kick + Secret Sword

5. Mewtwo

Psycho Cut + Psystrike

6. Rayquaza

Air Slash + Dragon Ascent

See the full ranked counter list for Mega Crabominable · 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.