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 — 4 if everyone is prepared

At level 40, a party of Hisuian Typhlosion's top six counters needs 3.36 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 3.77 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 15:26. No level in this range makes it soloable with a prepared party.

Hisuian Typhlosion · Elite

fireghost

Weak to

groundrockghostwaterdark

Boss CP: 48,927
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 Hisuian Typhlosion 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	6(5.28)	5(4.99)	7(6.20)	22:56	6.0
Level 25	5(4.85)	5(4.32)	5(4.96)	19:52	6.0
Level 30	4(3.87)	4(3.77)	5(4.28)	17:21	6.0
Level 35	4(3.57)	4(3.60)	5(4.02)	16:33	6.0
Level 40	4(3.30)	4(3.36)	4(3.77)	15:26	6.0
Level 45	4(3.21)	4(3.24)	4(3.61)	14:56	6.0
Level 50	4(3.16)	4(3.10)	4(3.48)	14:15	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.

4 trainers at level 40

Necrozma (Dawn Wings)3.30

A prepared party

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

4 trainers at level 40

Necrozma (Dawn Wings)3.30
Landorus (Therian)3.14
Darkrai3.36
Kyogre3.46
Tyranitar3.43
Hydreigon3.45

A mixed local group

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

4 trainers at level 40

Glimmora3.69
Greninja3.72
Garchomp3.70
Primarina3.71
Salamence3.71
Kingler3.75

The party these numbers assume

1. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

2. Landorus (Therian)

Mud Shot + Sandsear Storm

3. Darkrai

Snarl + Foul Play

4. Kyogre

Waterfall + Origin Pulse

5. Tyranitar

Smack Down + Brutal Swing

6. Hydreigon

Bite + Brutal Swing

See the full ranked counter list for Hisuian Typhlosion · 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.