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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Croconaw's top six counters needs 2.49 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.10 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 11:29. No level in this range makes it soloable with a prepared party.

Croconaw · Elite

water

Weak to

grasselectric

Boss CP: 29,238
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 Croconaw 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(3.44)	4(3.64)	5(4.45)	16:44	6.0
Level 25	4(3.02)	4(3.12)	4(3.82)	14:22	6.0
Level 30	3(2.56)	3(2.75)	4(3.42)	12:38	6.0
Level 35	3(2.52)	3(2.62)	4(3.23)	12:04	6.0
Level 40	3(2.31)	3(2.49)	4(3.10)	11:29	5.9
Level 45	3(2.27)	3(2.40)	3(2.98)	11:03	5.9
Level 50	3(2.15)	3(2.31)	3(2.90)	10:38	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.

3 trainers at level 40

Regieleki2.31

A prepared party

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

3 trainers at level 40

Regieleki2.31
Kartana2.48
Zeraora2.49
Thundurus (Therian)2.53
Xurkitree2.53
Zekrom2.62

A mixed local group

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

4 trainers at level 40

Meowscarada2.95
Kyurem (Black)2.99
Roserade3.04
Necrozma (Dawn Wings)3.06
Tapu Bulu3.08
Zapdos3.09

The party these numbers assume

1. Regieleki

Lock-On + Thunder Cage

2. Kartana

Razor Leaf + Leaf Blade

3. Zeraora

Volt Switch + Plasma Fists

4. Thundurus (Therian)

Volt Switch + Wildbolt Storm

5. Xurkitree

Thunder Shock + Discharge

6. Zekrom

Charge Beam + Fusion Bolt

See the full ranked counter list for Croconaw · 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.