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 5 to be safe — 4 if everyone is prepared

At level 40, a party of Mega Pyroar's top six counters needs 3.71 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.41 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 17:05. No level in this range makes it soloable with a prepared party.

Mega Pyroar · Super Mega

firenormal

Weak to

fightinggroundrockwater

Boss CP: 66,458
Boss HP: 25,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Pyroar 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	5(4.67)	6(5.71)	7(6.89)	26:17	6.0
Level 25	5(4.09)	5(4.88)	6(5.81)	22:27	6.0
Level 30	4(3.76)	5(4.13)	5(4.88)	18:59	6.0
Level 35	4(3.67)	4(3.93)	5(4.62)	18:04	6.0
Level 40	4(3.37)	4(3.71)	5(4.41)	17:05	6.0
Level 45	4(3.27)	4(3.57)	5(4.26)	16:25	5.9
Level 50	4(3.19)	4(3.46)	5(4.09)	15:54	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.

4 trainers at level 40

Keldeo3.37

A prepared party

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

4 trainers at level 40

Keldeo3.37
Blaziken3.62
Terrakion3.76
Landorus (Therian)3.74
Lucario3.85
Eternatus3.93

A mixed local group

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

5 trainers at level 40

Inteleon4.24
Tyrantrum4.21
Rampardos4.34
Garchomp4.33
Marshadow4.39
Urshifu (Rapid Strike)4.44

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Blaziken

Counter + Aura Sphere

3. Terrakion

Double Kick + Sacred Sword

4. Landorus (Therian)

Mud Shot + Sandsear Storm

5. Lucario

Force Palm + Aura Sphere

6. Eternatus

Poison Jab + Dynamax Cannon

See the full ranked counter list for Mega Pyroar · 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.