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 — 2 if everyone is prepared

At level 40, a party of Weepinbell's top six counters needs 1.68 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.04 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 7:57. No level in this range makes it soloable with a prepared party. A duo works from level 30.

Weepinbell · Shadow Tier 5

grasspoison

Weak to

flyingfirepsychicice

Boss CP: 23,690
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 Weepinbell 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(2.32)	3(2.47)	4(3.01)	11:40	6.0
Level 25	2(1.92)	3(2.13)	3(2.55)	10:05	6.0
Level 30	2(1.75)	2(1.85)	3(2.26)	8:44	5.9
Level 35	2(1.65)	2(1.77)	3(2.16)	8:22	5.9
Level 40	2(1.56)	2(1.68)	3(2.04)	7:57	5.7
Level 45	2(1.51)	2(1.63)	2(1.98)	7:41	5.6
Level 50	2(1.48)	2(1.57)	2(1.90)	7:26	5.6

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

Kyurem (White)1.56

A prepared party

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

2 trainers at level 40

Kyurem (White)1.56
Blacephalon1.66
Rayquaza1.66
Kyurem (Black)1.71
Mewtwo1.72
Reshiram1.79

A mixed local group

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

3 trainers at level 40

Necrozma (Dawn Wings)1.98
Toucannon2.00
Heatran1.99
Enamorus (Incarnate)2.01
Zamazenta (Crowned Shield)2.02
Zacian (Crowned Sword)2.06

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Blacephalon

Incinerate + Mind Blown

3. Rayquaza

Air Slash + Dragon Ascent

4. Kyurem (Black)

Dragon Tail + Freeze Shock

5. Mewtwo

Psycho Cut + Psystrike

6. Reshiram

Fire Fang + Fusion Flare

See the full ranked counter list for Weepinbell · 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.