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 2 to be safe — 2 if everyone is prepared

At level 40, a party of Muk's top six counters needs 1.30 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.53 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 3:48. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Muk · Shadow Tier 3

poison

Weak to

groundpsychic

Boss CP: 17,729
Boss HP: 4,000
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Muk 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	2(1.80)	2(1.93)	3(2.25)	5:40	5.5
Level 25	2(1.45)	2(1.58)	2(1.94)	4:37	5.1
Level 30	2(1.32)	2(1.41)	2(1.69)	4:08	4.6
Level 35	2(1.22)	2(1.34)	2(1.62)	3:55	4.5
Level 40	2(1.17)	2(1.30)	2(1.53)	3:48	4.3
Level 45	2(1.13)	2(1.25)	2(1.47)	3:40	4.1
Level 50	2(1.09)	2(1.22)	2(1.43)	3:34	4.1

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.

2 trainers at level 40

Mewtwo1.17

A prepared party

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

2 trainers at level 40

Mewtwo1.17
Hoopa (Unbound)1.27
Landorus (Therian)1.28
Necrozma (Dusk Mane)1.32
Groudon1.35
Necrozma (Dawn Wings)1.39

A mixed local group

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

2 trainers at level 40

Excadrill1.50
Metagross1.48
Garchomp1.51
Mamoswine1.51
Zacian (Crowned Sword)1.50
Landorus (Incarnate)1.53

The party these numbers assume

1. Mewtwo

Confusion + Psystrike

2. Hoopa (Unbound)

Confusion + Psychic

3. Landorus (Therian)

Mud Shot + Sandsear Storm

4. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

5. Groudon

Mud Shot + Precipice Blades

6. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

See the full ranked counter list for Muk · 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.