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 Crustle's top six counters needs 3.31 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.35 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 15:37. No level in this range makes it soloable with a prepared party.

Crustle · Shadow Tier 5

bugrock

Weak to

rocksteelwater

Boss CP: 36,455
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 Crustle 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(3.90)	5(4.79)	7(6.56)	22:38	6.0
Level 25	4(3.25)	5(4.20)	6(5.50)	19:52	5.8
Level 30	3(2.94)	4(3.70)	5(4.80)	17:29	5.6
Level 35	3(2.88)	4(3.44)	5(4.56)	16:16	5.5
Level 40	3(2.60)	4(3.31)	5(4.35)	15:37	5.4
Level 45	3(2.54)	4(3.18)	5(4.19)	15:01	5.3
Level 50	3(2.48)	4(3.11)	5(4.07)	14:41	5.1

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

Zacian (Crowned Sword)2.60

A prepared party

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

4 trainers at level 40

Zacian (Crowned Sword)2.60
Necrozma (Dusk Mane)2.73
Zamazenta (Crowned Shield)2.80
Metagross3.88
Dialga (Origin)3.89
Inteleon3.93

A mixed local group

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

5 trainers at level 40

Tinkaton4.19
Empoleon4.21
Rhyperior4.27
Glimmora4.26
Kyurem (White)4.28
Rampardos4.30

The party these numbers assume

1. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

2. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

3. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

4. Metagross

Fury Cutter + Meteor Mash

5. Dialga (Origin)

Metal Claw + Roar of Time

6. Inteleon

Water Gun + Hydro Cannon

See the full ranked counter list for Crustle · 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.