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 Croagunk's top six counters needs 1.03 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.25 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 4:51. A prepared solo becomes possible at level 45. A duo works from level 20.

Croagunk · Shadow Tier 5

poisonfighting

Weak to

psychicflyingground

Boss CP: 15,305
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 Croagunk 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(1.22)	2(1.42)	2(1.75)	6:44	5.3
Level 25	2(1.06)	2(1.24)	2(1.51)	5:52	4.9
Level 30	1(0.95)	2(1.12)	2(1.36)	5:17	4.6
Level 35	1(0.91)	2(1.07)	2(1.30)	5:04	4.4
Level 40	1(0.88)	2(1.03)	2(1.25)	4:51	4.2
Level 45	1(0.85)	1(0.99)	2(1.20)	4:40	4.0
Level 50	1(0.82)	1(0.96)	2(1.16)	4:31	3.8

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

Mewtwo0.88

A prepared party

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

2 trainers at level 40

Mewtwo0.88
Hoopa (Unbound)0.95
Lunala1.08
Hoopa1.08
Alakazam1.08
Espeon1.10

A mixed local group

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

2 trainers at level 40

Galarian Articuno1.18
Gallade1.20
Gardevoir1.19
Exeggutor1.22
Necrozma1.24
Meloetta (Aria)1.26

The party these numbers assume

1. Mewtwo

Confusion + Psystrike

2. Hoopa (Unbound)

Confusion + Psychic

3. Lunala

Confusion + Psychic

4. Hoopa

Confusion + Psychic

5. Alakazam

Confusion + Psychic

6. Espeon

Confusion + Psychic

See the full ranked counter list for Croagunk · 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.