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 Fezandipiti's top six counters needs 3.11 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.31 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 14:19. No level in this range makes it soloable with a prepared party.

Fezandipiti · Elite

poisonfairy

Weak to

groundsteelpsychic

Boss CP: 38,858
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 Fezandipiti 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	4(3.65)	5(4.42)	7(6.31)	20:20	6.0
Level 25	4(3.21)	4(3.86)	6(5.48)	17:46	6.0
Level 30	3(2.94)	4(3.50)	5(4.71)	16:06	6.0
Level 35	3(2.82)	4(3.32)	5(4.51)	15:16	5.9
Level 40	3(2.59)	4(3.11)	5(4.31)	14:19	5.8
Level 45	3(2.52)	4(3.03)	5(4.18)	13:55	5.7
Level 50	3(2.46)	3(2.95)	5(4.04)	13:34	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.

3 trainers at level 40

Necrozma (Dusk Mane)2.59

A prepared party

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

4 trainers at level 40

Necrozma (Dusk Mane)2.59
Zacian (Crowned Sword)2.61
Zamazenta (Crowned Shield)2.69
Mewtwo3.35
Landorus (Therian)3.67
Necrozma (Dawn Wings)3.74

A mixed local group

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

5 trainers at level 40

Kyurem (White)4.15
Jirachi4.23
Hoopa4.24
Hoopa (Unbound)4.29
Tinkaton4.29
Genesect4.36

The party these numbers assume

1. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

2. Zacian (Crowned Sword)

Metal Claw + Behemoth Blade

3. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

4. Mewtwo

Psycho Cut + Psystrike

5. Landorus (Therian)

Mud Shot + Sandsear Storm

6. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

See the full ranked counter list for Fezandipiti · 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.