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 Pumpkaboo (Super)'s top six counters needs 1.14 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.43 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 5:14. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Pumpkaboo (Super) · Tier 5

ghostgrass

Weak to

flyingghostfireicedark

Boss CP: 18,926
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 Pumpkaboo (Super) 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(1.70)	2(1.63)	2(2.00)	7:30	6.0
Level 25	2(1.38)	2(1.40)	2(1.75)	6:28	5.7
Level 30	2(1.21)	2(1.26)	2(1.57)	5:49	5.3
Level 35	2(1.12)	2(1.19)	2(1.50)	5:28	5.0
Level 40	2(1.08)	2(1.14)	2(1.43)	5:14	4.9
Level 45	2(1.04)	2(1.10)	2(1.38)	5:04	4.6
Level 50	1(0.99)	2(1.06)	2(1.33)	4:52	4.4

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)1.08

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)1.08
Kyurem (White)1.11
Kyurem (Black)1.12
Blacephalon1.12
Rayquaza1.15
Reshiram1.24

A mixed local group

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

2 trainers at level 40

Honchkrow1.40
Chandelure1.41
Cinderace1.42
Volcarona1.43
Staraptor1.42
Heatran1.44

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Kyurem (White)

Ice Fang + Ice Burn

3. Kyurem (Black)

Shadow Claw + Freeze Shock

4. Blacephalon

Astonish + Mind Blown

5. Rayquaza

Air Slash + Dragon Ascent

6. Reshiram

Fire Fang + Fusion Flare

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