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 Banette's top six counters needs 2.82 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.18 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 13:20. No level in this range makes it soloable with a prepared party.

Banette · Shadow Tier 5

ghost

Weak to

ghostdark

Boss CP: 33,885
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 Banette 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(4.82)	5(4.41)	6(5.30)	20:50	6.0
Level 25	4(3.28)	4(3.56)	5(4.43)	16:49	6.0
Level 30	4(3.15)	4(3.07)	4(3.75)	14:30	6.0
Level 35	4(3.03)	3(2.96)	4(3.41)	13:59	6.0
Level 40	3(2.69)	3(2.82)	4(3.18)	13:20	6.0
Level 45	3(2.68)	3(2.73)	4(3.04)	12:54	6.0
Level 50	3(2.63)	3(2.64)	3(2.90)	12:28	6.0

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 (Black)2.69

A prepared party

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

3 trainers at level 40

Kyurem (Black)2.69
Darkrai2.67
Eternatus2.79
Tyranitar2.91
Zamazenta (Crowned Shield)2.94
Necrozma (Dusk Mane)2.95

A mixed local group

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

4 trainers at level 40

Necrozma (Dawn Wings)2.92
Hydreigon3.16
Dragapult3.11
Weavile3.12
Salamence3.12
Mewtwo3.13

The party these numbers assume

1. Kyurem (Black)

Shadow Claw + Freeze Shock

2. Darkrai

Snarl + Foul Play

3. Eternatus

Dragon Tail + Dynamax Cannon

4. Tyranitar

Bite + Brutal Swing

5. Zamazenta (Crowned Shield)

Metal Claw + Behemoth Bash

6. Necrozma (Dusk Mane)

Shadow Claw + Sunsteel Strike

See the full ranked counter list for Banette · 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.