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 3 to be safe — 3 if everyone is prepared

At level 40, a party of Flygon's top six counters needs 2.17 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.98 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:58. No level in this range makes it soloable with a prepared party. A duo works from level 50.

Flygon · Elite

grounddragon

Weak to

icedragonfairy

Boss CP: 42,088
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 Flygon 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	3(2.75)	4(3.72)	5(4.76)	17:07	6.0
Level 25	3(2.08)	3(2.92)	4(3.93)	13:26	6.0
Level 30	2(1.83)	3(2.48)	4(3.33)	11:25	6.0
Level 35	2(1.74)	3(2.32)	4(3.15)	10:40	6.0
Level 40	2(1.68)	3(2.17)	3(2.98)	9:58	6.0
Level 45	2(1.61)	3(2.07)	3(2.85)	9:31	6.0
Level 50	2(1.53)	2(1.98)	3(2.76)	9:06	6.0

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.

2 trainers at level 40

Kyurem (White)1.68

A prepared party

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

3 trainers at level 40

Kyurem (White)1.68
Kyurem (Black)1.90
Eternatus2.23
Mamoswine2.38
Baxcalibur2.35
Galarian Darmanitan (Standard)2.45

A mixed local group

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

3 trainers at level 40

Mr. Rime2.83
Aurorus2.94
Rayquaza2.92
Palkia (Origin)2.93
Articuno2.92
Avalugg2.94

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Kyurem (Black)

Dragon Tail + Freeze Shock

3. Eternatus

Dragon Tail + Dynamax Cannon

4. Mamoswine

Powder Snow + Avalanche

5. Baxcalibur

Ice Fang + Avalanche

6. Galarian Darmanitan (Standard)

Ice Fang + Avalanche

See the full ranked counter list for Flygon · 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.