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 6 to be safe — 5 if everyone is prepared

At level 40, a party of Pecharunt's top six counters needs 4.36 trainers (round up: 5), and a mixed lobby of ranks 13-24 needs 5.19 (round up: 6). The raid timer is 300 seconds and one prepared trainer alone would take 20:03. No level in this range makes it soloable with a prepared party.

Pecharunt · Elite

poisonghost

Weak to

groundghostpsychicdark

Boss CP: 41,053
Boss HP: 20,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Pecharunt 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	7(6.91)	8(7.13)	9(8.12)	32:50	6.0
Level 25	7(6.31)	6(5.75)	7(6.56)	26:27	6.0
Level 30	6(5.37)	6(5.05)	6(5.99)	23:15	6.0
Level 35	5(4.49)	5(4.65)	6(5.49)	21:24	6.0
Level 40	4(3.92)	5(4.36)	6(5.19)	20:03	6.0
Level 45	4(3.77)	5(4.27)	5(4.98)	19:38	6.0
Level 50	4(3.55)	5(4.09)	5(4.85)	18:50	6.0

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.

4 trainers at level 40

Necrozma (Dawn Wings)3.92

A prepared party

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

5 trainers at level 40

Necrozma (Dawn Wings)3.92
Mewtwo4.17
Hoopa (Unbound)4.32
Landorus (Therian)4.49
Darkrai4.62
Groudon4.63

A mixed local group

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

6 trainers at level 40

Kingambit5.03
Absol5.07
Hisuian Zoroark5.08
Excadrill5.07
Garchomp5.14
Zamazenta (Crowned Shield)5.19

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Mewtwo

Psycho Cut + Psystrike

3. Hoopa (Unbound)

Confusion + Psychic

4. Landorus (Therian)

Extrasensory + Sandsear Storm

5. Darkrai

Snarl + Foul Play

6. Groudon

Mud Shot + Precipice Blades

See the full ranked counter list for Pecharunt · 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.