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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Kilowattrel's top six counters needs 2.57 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.28 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 11:50. No level in this range makes it soloable with a prepared party.

Kilowattrel · Elite

electricflying

Weak to

rockice

Boss CP: 40,465
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 Kilowattrel 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(2.97)	4(3.76)	5(4.86)	17:17	6.0
Level 25	3(2.57)	4(3.20)	5(4.14)	14:44	6.0
Level 30	3(2.33)	3(2.85)	4(3.66)	13:06	6.0
Level 35	3(2.19)	3(2.67)	4(3.47)	12:18	6.0
Level 40	3(2.05)	3(2.57)	4(3.28)	11:50	5.9
Level 45	2(1.97)	3(2.49)	4(3.15)	11:27	5.9
Level 50	2(1.92)	3(2.38)	4(3.04)	10:57	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.

3 trainers at level 40

Kyurem (White)2.05

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)2.05
Kyurem (Black)2.33
Eternatus2.72
Rampardos2.74
Glimmora2.80
Rhyperior2.80

A mixed local group

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

4 trainers at level 40

Terrakion3.08
Kyurem3.08
Tyranitar3.11
Regigigas3.19
Weavile3.30
Stonjourner3.29

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Kyurem (Black)

Dragon Tail + Freeze Shock

3. Eternatus

Poison Jab + Dynamax Cannon

4. Rampardos

Smack Down + Rock Slide

5. Glimmora

Rock Throw + Meteor Beam

6. Rhyperior

Smack Down + Rock Wrecker

See the full ranked counter list for Kilowattrel · 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.