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 1 to be safe — 1 if everyone is prepared

At level 40, a party of Krookodile's top six counters needs 0.55 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.65 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 1:36. A prepared solo becomes possible at level 20. A duo works from level 20.

Krookodile · Tier 3

grounddark

Weak to

fightingbugwatergrassicefairy

Boss CP: 19,255
Boss HP: 3,600
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Krookodile 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	1(0.70)	1(0.80)	1(0.95)	2:20	5.6
Level 25	1(0.59)	1(0.69)	1(0.81)	2:01	5.0
Level 30	1(0.54)	1(0.61)	1(0.72)	1:47	4.0
Level 35	1(0.52)	1(0.57)	1(0.68)	1:41	3.8
Level 40	1(0.49)	1(0.55)	1(0.65)	1:36	3.4
Level 45	1(0.47)	1(0.52)	1(0.63)	1:32	3.1
Level 50	1(0.45)	1(0.51)	1(0.61)	1:29	2.8

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

Keldeo0.49

A prepared party

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

1 trainer at level 40

Keldeo0.49
Kyurem (White)0.50
Kyurem (Black)0.56
Kartana0.57
Terrakion0.57
Lucario0.59

A mixed local group

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

1 trainer at level 40

Enamorus (Incarnate)0.64
Hisuian Decidueye0.64
Conkeldurr0.64
Tapu Bulu0.65
Urshifu (Single Strike)0.64
Urshifu (Rapid Strike)0.65

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Kyurem (White)

Ice Fang + Ice Burn

3. Kyurem (Black)

Dragon Tail + Freeze Shock

4. Kartana

Fury Cutter + Sacred Sword

5. Terrakion

Double Kick + Sacred Sword

6. Lucario

Force Palm + Aura Sphere

See the full ranked counter list for Krookodile · 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.