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 — 1 if everyone is prepared

At level 40, a party of Mega Camerupt's top six counters needs 0.90 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 1.11 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 4:10. A prepared solo becomes possible at level 30. A duo works from level 20.

Mega Camerupt · Mega

fireground

Weak to

waterground

Boss CP: 35,775
Boss HP: 9,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Camerupt 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(1.24)	2(1.40)	2(1.73)	6:32	6.0
Level 25	2(1.05)	2(1.13)	2(1.46)	5:15	6.0
Level 30	1(0.93)	1(0.99)	2(1.25)	4:36	6.0
Level 35	1(0.88)	1(0.94)	2(1.17)	4:22	6.0
Level 40	1(0.83)	1(0.90)	2(1.11)	4:10	6.0
Level 45	1(0.79)	1(0.85)	2(1.07)	3:57	6.0
Level 50	1(0.76)	1(0.82)	2(1.02)	3:48	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.

1 trainer at level 40

Kyogre0.83

A prepared party

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

1 trainer at level 40

Kyogre0.83
Inteleon0.86
Primarina0.90
Quaquaval0.91
Greninja0.93
Kingler0.95

A mixed local group

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

2 trainers at level 40

Hisuian Samurott1.02
Empoleon1.03
Volcanion1.08
Crawdaunt1.07
Tatsugiri1.06
Crabominable1.13

The party these numbers assume

1. Kyogre

Waterfall + Origin Pulse

2. Inteleon

Water Gun + Hydro Cannon

3. Primarina

Waterfall + Hydro Cannon

4. Quaquaval

Water Gun + Hydro Cannon

5. Greninja

Water Shuriken + Hydro Cannon

6. Kingler

Bubble + Crabhammer

See the full ranked counter list for Mega Camerupt · 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.