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 2 to be safe — 2 if everyone is prepared

At level 40, a party of Vespiquen's top six counters needs 1.46 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.81 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 6:42. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Vespiquen · Tier 5

bugflying

Weak to

rockflyingfireelectricice

Boss CP: 28,758
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 Vespiquen 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(2.01)	3(2.07)	3(2.60)	9:32	6.0
Level 25	2(1.72)	2(1.79)	3(2.24)	8:14	5.9
Level 30	2(1.53)	2(1.60)	3(2.00)	7:23	5.7
Level 35	2(1.43)	2(1.52)	2(1.90)	6:59	5.6
Level 40	2(1.37)	2(1.46)	2(1.81)	6:42	5.4
Level 45	2(1.32)	2(1.40)	2(1.75)	6:27	5.3
Level 50	2(1.28)	2(1.36)	2(1.69)	6:15	5.2

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

Rampardos1.37

A prepared party

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

2 trainers at level 40

Rampardos1.37
Glimmora1.38
Rhyperior1.48
Gigalith1.47
Tyrantrum1.51
Terrakion1.52

A mixed local group

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

2 trainers at level 40

Rayquaza1.77
Aurorus1.77
Archeops1.77
Landorus (Incarnate)1.77
Aerodactyl1.78
Lycanroc (Midday)1.82

The party these numbers assume

1. Rampardos

Smack Down + Rock Slide

2. Glimmora

Rock Throw + Meteor Beam

3. Rhyperior

Smack Down + Rock Wrecker

4. Gigalith

Lock-On + Meteor Beam

5. Tyrantrum

Rock Throw + Meteor Beam

6. Terrakion

Smack Down + Rock Slide

See the full ranked counter list for Vespiquen · 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.