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 1 to be safe — 1 if everyone is prepared

At level 40, a party of Glaceon's top six counters needs 0.60 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.81 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 1:45. A prepared solo becomes possible at level 20. A duo works from level 20.

Glaceon · Tier 3

ice

Weak to

fightingrocksteelfire

Boss CP: 22,515
Boss HP: 3,600
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Glaceon 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	1(0.74)	1(0.87)	2(1.20)	2:32	5.0
Level 25	1(0.66)	1(0.74)	2(1.04)	2:10	4.0
Level 30	1(0.62)	1(0.66)	1(0.91)	1:56	3.2
Level 35	1(0.57)	1(0.62)	1(0.88)	1:49	2.7
Level 40	1(0.55)	1(0.60)	1(0.81)	1:45	2.3
Level 45	1(0.55)	1(0.58)	1(0.79)	1:42	2.2
Level 50	1(0.53)	1(0.56)	1(0.77)	1:38	1.9

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.

1 trainer at level 40

Zamazenta (Crowned Shield)0.55

A prepared party

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

1 trainer at level 40

Zamazenta (Crowned Shield)0.55
Zacian (Crowned Sword)0.54
Necrozma (Dusk Mane)0.56
Keldeo0.62
Blacephalon0.63
Lucario0.69

A mixed local group

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

1 trainer at level 40

Cinderace0.80
Kartana0.79
Heatran0.81
Urshifu (Rapid Strike)0.81
Dialga (Origin)0.80
Conkeldurr0.82

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)

Metal Claw + Sunsteel Strike

4. Keldeo

Low Kick + Secret Sword

5. Blacephalon

Incinerate + Mind Blown

6. Lucario

Force Palm + Aura Sphere

See the full ranked counter list for Glaceon · 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.