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 Quagsire's top six counters needs 0.75 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.92 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 2:11. A prepared solo becomes possible at level 25. A duo works from level 20.

Quagsire · Shadow Tier 3

waterground

Weak to

grass

Boss CP: 13,276
Boss HP: 4,000
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Quagsire 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(0.96)	2(1.07)	2(1.34)	3:07	5.1
Level 25	1(0.86)	1(0.91)	2(1.14)	2:41	4.5
Level 30	1(0.72)	1(0.82)	2(1.01)	2:24	4.0
Level 35	1(0.68)	1(0.78)	1(0.97)	2:17	3.6
Level 40	1(0.66)	1(0.75)	1(0.92)	2:11	3.3
Level 45	1(0.63)	1(0.72)	1(0.89)	2:06	3.1
Level 50	1(0.62)	1(0.69)	1(0.85)	2:02	2.9

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.

1 trainer at level 40

Kartana0.66

A prepared party

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

1 trainer at level 40

Kartana0.66
Shaymin (Sky)0.72
Rillaboom0.75
Zarude0.75
Roserade0.80
Meowscarada0.81

A mixed local group

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

1 trainer at level 40

Shaymin (Land)0.86
Torterra0.88
Breloom0.89
Tangrowth0.89
Celebi0.91
Xurkitree0.94

The party these numbers assume

1. Kartana

Razor Leaf + Leaf Blade

2. Shaymin (Sky)

Magical Leaf + Grass Knot

3. Rillaboom

Razor Leaf + Frenzy Plant

4. Zarude

Vine Whip + Power Whip

5. Roserade

Magical Leaf + Grass Knot

6. Meowscarada

Leafage + Frenzy Plant

See the full ranked counter list for Quagsire · 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.