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 Glimmora's top six counters needs 2.77 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.74 (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 Glimmora · Super Mega

rockpoison

Weak to

groundsteelwaterpsychic

Boss CP: 75,369
Boss HP: 25,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Glimmora 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(3.98)	5(4.04)	6(5.79)	18:36	6.0
Level 25	4(3.64)	4(3.48)	5(4.71)	16:00	6.0
Level 30	4(3.21)	4(3.07)	5(4.17)	14:09	6.0
Level 35	3(2.89)	3(2.91)	4(3.94)	13:22	6.0
Level 40	3(2.57)	3(2.77)	4(3.74)	12:44	6.0
Level 45	3(2.43)	3(2.63)	4(3.55)	12:05	5.9
Level 50	3(2.32)	3(2.51)	4(3.40)	11:32	5.9

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.

3 trainers at level 40

Landorus (Therian)2.57

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)2.57
Groudon2.67
Excadrill2.78
Zamazenta (Crowned Shield)2.82
Zacian (Crowned Sword)2.86
Necrozma (Dusk Mane)2.91

A mixed local group

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

4 trainers at level 40

Golurk3.44
Mewtwo3.54
Mudsdale3.55
Donphan3.58
Hippowdon3.57
Golem3.77

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. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

5. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

6. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

See the full ranked counter list for Mega Glimmora · 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.