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 — 2 if everyone is prepared

At level 40, a party of Mega Floette (Eternal Flower)'s top six counters needs 1.46 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.02 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 6:48. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Mega Floette (Eternal Flower) · Mega

fairy

Weak to

poisonsteel

Boss CP: 51,341
Boss HP: 9,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Floette (Eternal Flower) 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	2(1.81)	3(2.14)	3(2.98)	9:58	6.0
Level 25	2(1.43)	2(1.79)	3(2.59)	8:20	6.0
Level 30	2(1.32)	2(1.63)	3(2.28)	7:34	6.0
Level 35	2(1.28)	2(1.58)	3(2.12)	7:19	5.9
Level 40	2(1.17)	2(1.46)	3(2.02)	6:48	5.9
Level 45	2(1.15)	2(1.41)	2(1.96)	6:33	5.9
Level 50	2(1.12)	2(1.36)	2(1.89)	6:19	5.7

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

Zacian (Crowned Sword)1.17

A prepared party

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

2 trainers at level 40

Zacian (Crowned Sword)1.17
Necrozma (Dusk Mane)1.20
Zamazenta (Crowned Shield)1.21
Metagross1.68
Eternatus1.67
Necrozma (Dawn Wings)1.84

A mixed local group

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

3 trainers at level 40

Genesect1.98
Genesect (Burn)1.98
Genesect (Chill)1.98
Genesect (Douse)1.98
Genesect (Shock)1.98
Melmetal1.99

The party these numbers assume

1. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

2. Necrozma (Dusk Mane)

Metal Claw + Sunsteel Strike

3. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

4. Metagross

Bullet Punch + Meteor Mash

5. Eternatus

Poison Jab + Sludge Bomb

6. Necrozma (Dawn Wings)

Metal Claw + Moongeist Beam

See the full ranked counter list for Mega Floette (Eternal Flower) · 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.