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 3 to be safe — 3 if everyone is prepared

At level 40, a party of Pyukumuku's top six counters needs 2.18 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.74 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 10:03. No level in this range makes it soloable with a prepared party.

Pyukumuku · Tier 5

water

Weak to

grasselectric

Boss CP: 21,206
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 Pyukumuku 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	3(2.92)	4(3.03)	4(3.86)	13:56	6.0
Level 25	3(2.52)	3(2.69)	4(3.30)	12:24	5.9
Level 30	3(2.17)	3(2.39)	4(3.02)	11:00	5.5
Level 35	3(2.12)	3(2.29)	3(2.84)	10:34	5.3
Level 40	2(1.96)	3(2.18)	3(2.74)	10:03	4.9
Level 45	2(1.92)	3(2.13)	3(2.63)	9:47	4.7
Level 50	2(1.83)	3(2.06)	3(2.55)	9:30	4.5

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

Regieleki1.96

A prepared party

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

3 trainers at level 40

Regieleki1.96
Thundurus (Therian)2.13
Kartana2.21
Zeraora2.25
Xurkitree2.25
Zekrom2.30

A mixed local group

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

3 trainers at level 40

Kyurem (Black)2.62
Deoxys2.66
Necrozma (Dawn Wings)2.67
Zapdos2.69
Roserade2.70
Meowscarada2.74

The party these numbers assume

1. Regieleki

Lock-On + Thunder Cage

2. Thundurus (Therian)

Volt Switch + Wildbolt Storm

3. Kartana

Razor Leaf + Leaf Blade

4. Zeraora

Volt Switch + Plasma Fists

5. Xurkitree

Thunder Shock + Discharge

6. Zekrom

Charge Beam + Fusion Bolt

See the full ranked counter list for Pyukumuku · 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.