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 Farfetch'd's top six counters needs 2.07 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.61 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:47. No level in this range makes it soloable with a prepared party. A duo works from level 45.

Farfetch'd · Shadow Tier 5

normalflying

Weak to

rockelectricice

Boss CP: 19,410
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Farfetch'd 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(2.66)	3(2.95)	4(3.61)	13:55	6.0
Level 25	3(2.31)	3(2.55)	4(3.21)	12:04	6.0
Level 30	3(2.07)	3(2.24)	3(2.90)	10:35	5.8
Level 35	2(1.97)	3(2.14)	3(2.74)	10:06	5.8
Level 40	2(1.92)	3(2.07)	3(2.61)	9:47	5.6
Level 45	2(1.83)	2(1.99)	3(2.52)	9:23	5.4
Level 50	2(1.79)	2(1.92)	3(2.45)	9:03	5.3

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)1.92

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)1.92
Regieleki1.95
Kyurem (Black)2.08
Thundurus (Therian)2.11
Zeraora2.15
Xurkitree2.20

A mixed local group

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

3 trainers at level 40

Electivire2.50
Raikou2.52
Gigalith2.50
Necrozma (Dusk Mane)2.60
Galarian Darmanitan (Standard)2.60
Baxcalibur2.64

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Regieleki

Lock-On + Thunder Cage

3. Kyurem (Black)

Dragon Tail + Freeze Shock

4. Thundurus (Therian)

Volt Switch + Wildbolt Storm

5. Zeraora

Volt Switch + Plasma Fists

6. Xurkitree

Thunder Shock + Discharge

See the full ranked counter list for Farfetch'd · 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.