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 Gimmighoul's top six counters needs 1.60 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.84 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 7:21. No level in this range makes it soloable with a prepared party. A duo works from level 30.

Gimmighoul · Elite

ghost

Weak to

ghostdark

Boss CP: 20,910
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 Gimmighoul 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(3.45)	3(2.52)	4(3.03)	11:37	6.0
Level 25	4(3.17)	3(2.22)	3(2.58)	10:14	6.0
Level 30	2(1.49)	2(1.77)	3(2.19)	8:07	6.0
Level 35	2(1.30)	2(1.64)	3(2.06)	7:32	6.0
Level 40	2(1.32)	2(1.60)	2(1.84)	7:21	6.0
Level 45	2(1.23)	2(1.53)	2(1.79)	7:02	6.0
Level 50	2(1.23)	2(1.49)	2(1.72)	6:52	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.

2 trainers at level 40

Necrozma (Dawn Wings)1.32

A prepared party

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

2 trainers at level 40

Necrozma (Dawn Wings)1.32
Darkrai1.56
Kyurem (Black)1.67
Hydreigon1.67
Tyranitar1.67
Absol1.69

A mixed local group

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

2 trainers at level 40

Incineroar1.80
Hoopa (Unbound)1.81
Giratina (Origin)1.82
Lunala1.82
Zoroark1.82
Gengar1.83

The party these numbers assume

1. Necrozma (Dawn Wings)

Shadow Claw + Moongeist Beam

2. Darkrai

Snarl + Foul Play

3. Kyurem (Black)

Shadow Claw + Freeze Shock

4. Hydreigon

Bite + Brutal Swing

5. Tyranitar

Bite + Brutal Swing

6. Absol

Snarl + Brutal Swing

See the full ranked counter list for Gimmighoul · 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.