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 Mr. Mime's top six counters needs 0.63 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.87 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 1:51. A prepared solo becomes possible at level 20. A duo works from level 20.

Mr. Mime · Tier 3

psychicfairy

Weak to

poisonghoststeel

Boss CP: 18,421
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 Mr. Mime 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(0.75)	1(0.91)	2(1.26)	2:40	4.6
Level 25	1(0.66)	1(0.78)	2(1.08)	2:17	3.6
Level 30	1(0.58)	1(0.70)	1(0.95)	2:03	2.8
Level 35	1(0.55)	1(0.66)	1(0.91)	1:56	2.5
Level 40	1(0.56)	1(0.63)	1(0.87)	1:51	2.2
Level 45	1(0.53)	1(0.61)	1(0.84)	1:47	2.0
Level 50	1(0.52)	1(0.60)	1(0.81)	1:46	1.8

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

Zacian (Crowned Sword)0.56

A prepared party

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

1 trainer at level 40

Zacian (Crowned Sword)0.56
Zamazenta (Crowned Shield)0.55
Necrozma (Dusk Mane)0.58
Necrozma (Dawn Wings)0.59
Eternatus0.74
Metagross0.77

A mixed local group

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

1 trainer at level 40

Dialga (Origin)0.84
Kyurem (White)0.85
Gholdengo0.85
Naganadel0.86
Dragapult0.87
Giratina (Origin)0.88

The party these numbers assume

1. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

2. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

3. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

4. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

5. Eternatus

Poison Jab + Sludge Bomb

6. Metagross

Bullet Punch + Meteor Mash

See the full ranked counter list for Mr. Mime · 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.