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 — 2 if everyone is prepared

At level 40, a party of Pumpkaboo (Small)'s top six counters needs 1.98 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.46 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:06. No level in this range makes it soloable with a prepared party. A duo works from level 40.

Pumpkaboo (Small) · Elite

ghostgrass

Weak to

flyingghostfireicedark

Boss CP: 22,842
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 Pumpkaboo (Small) 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(2.77)	3(2.89)	4(3.48)	13:19	6.0
Level 25	3(2.51)	3(2.49)	4(3.02)	11:27	6.0
Level 30	3(2.15)	3(2.21)	3(2.70)	10:09	5.9
Level 35	3(2.01)	3(2.08)	3(2.59)	9:35	5.7
Level 40	2(1.85)	2(1.98)	3(2.46)	9:06	5.5
Level 45	2(1.78)	2(1.90)	3(2.39)	8:45	5.4
Level 50	2(1.73)	2(1.84)	3(2.31)	8:27	5.2

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)1.85

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)1.85
Kyurem (Black)1.89
Kyurem (White)1.91
Rayquaza1.99
Blacephalon2.08
Reshiram2.15

A mixed local group

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

3 trainers at level 40

Cinderace2.36
Volcarona2.41
Heatran2.45
Chandelure2.45
Hydreigon2.46
Honchkrow2.45

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Kyurem (Black)

Shadow Claw + Freeze Shock

3. Kyurem (White)

Ice Fang + Ice Burn

4. Rayquaza

Air Slash + Dragon Ascent

5. Blacephalon

Incinerate + Mind Blown

6. Reshiram

Fire Fang + Fusion Flare

See the full ranked counter list for Pumpkaboo (Small) · 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.