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 Galarian Zigzagoon's top six counters needs 0.04 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.04 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 0:06. A prepared solo becomes possible at level 20. A duo works from level 20.

Galarian Zigzagoon · Tier 1

darknormal

Weak to

fightingbugfairy

Boss CP: 1,742
Boss HP: 600
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Galarian Zigzagoon at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time
Level 20	1(0.04)	1(0.05)	1(0.06)	0:09
Level 25	1(0.03)	1(0.04)	1(0.05)	0:08
Level 30	1(0.03)	1(0.04)	1(0.04)	0:07
Level 35	1(0.03)	1(0.04)	1(0.04)	0:07
Level 40	1(0.03)	1(0.04)	1(0.04)	0:06
Level 45	1(0.03)	1(0.04)	1(0.04)	0:06
Level 50	1(0.03)	1(0.03)	1(0.04)	0:06

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

Lucario0.03

A prepared party

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

1 trainer at level 40

Lucario0.03
Kartana0.04
Breloom0.03
Keldeo0.04
Urshifu (Rapid Strike)0.04
Urshifu (Single Strike)0.04

A mixed local group

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

1 trainer at level 40

Blaziken0.04
Cobalion0.04
Virizion0.04
Mienshao0.04
Primeape0.04
Hawlucha0.04

The party these numbers assume

1. Lucario

Force Palm + Aura Sphere

2. Kartana

Fury Cutter + Sacred Sword

3. Breloom

Force Palm + Dynamic Punch

4. Keldeo

Low Kick + Sacred Sword

5. Urshifu (Rapid Strike)

Counter + Brick Break

6. Urshifu (Single Strike)

Counter + Brick Break

See the full ranked counter list for Galarian Zigzagoon · 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.