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 Drowzee's top six counters needs 2.49 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.83 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 11:28. No level in this range makes it soloable with a prepared party.

Drowzee · Elite

psychic

Weak to

bugghostdark

Boss CP: 18,073
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 Drowzee 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(2.78)	4(3.42)	5(4.00)	15:45	5.6
Level 25	3(2.47)	4(3.04)	4(3.45)	14:00	5.1
Level 30	3(2.16)	3(2.73)	4(3.11)	12:33	4.6
Level 35	3(2.09)	3(2.62)	3(2.97)	12:05	4.4
Level 40	2(1.99)	3(2.49)	3(2.83)	11:28	4.2
Level 45	2(1.94)	3(2.41)	3(2.75)	11:07	4.0
Level 50	2(1.86)	3(2.35)	3(2.65)	10:49	3.8

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

Necrozma (Dawn Wings)1.99

A prepared party

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

3 trainers at level 40

Necrozma (Dawn Wings)1.99
Darkrai2.48
Blacephalon2.50
Kyurem (Black)2.63
Lunala2.67
Absol2.69

A mixed local group

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

3 trainers at level 40

Zacian (Crowned Sword)2.78
Gholdengo2.80
Hoopa (Unbound)2.81
Zamazenta (Crowned Shield)2.83
Giratina (Origin)2.82
Hoopa2.83

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Darkrai

Snarl + Foul Play

3. Blacephalon

Astonish + Shadow Ball

4. Kyurem (Black)

Shadow Claw + Freeze Shock

5. Lunala

Shadow Claw + Shadow Ball

6. Absol

Snarl + Brutal Swing

See the full ranked counter list for Drowzee · 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.