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 Snover's top six counters needs 1.24 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.46 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 5:42. No level in this range makes it soloable with a prepared party. A duo works from level 20.

Snover · Elite

grassice

Weak to

firefightingflyingpoisonrockbug

Boss CP: 20,139
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 Snover 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	2(1.47)	2(1.75)	3(2.04)	8:02	5.9
Level 25	2(1.26)	2(1.54)	2(1.78)	7:04	5.5
Level 30	2(1.11)	2(1.36)	2(1.60)	6:15	5.2
Level 35	2(1.04)	2(1.30)	2(1.53)	5:58	5.0
Level 40	1(0.98)	2(1.24)	2(1.46)	5:42	4.9
Level 45	1(0.96)	2(1.20)	2(1.41)	5:30	4.7
Level 50	1(0.93)	2(1.16)	2(1.37)	5:21	4.6

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.

1 trainer at level 40

Blacephalon0.98

A prepared party

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

2 trainers at level 40

Blacephalon0.98
Reshiram1.18
Chandelure1.30
Volcarona1.32
Heatran1.32
Blaziken1.32

A mixed local group

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

2 trainers at level 40

Zacian (Crowned Sword)1.42
Volcanion1.45
Charizard1.44
Infernape1.44
Zamazenta (Crowned Shield)1.45
Flareon1.45

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Reshiram

Fire Fang + Fusion Flare

3. Chandelure

Fire Spin + Overheat

4. Volcarona

Fire Spin + Overheat

5. Heatran

Fire Spin + Magma Storm

6. Blaziken

Fire Spin + Blast Burn

See the full ranked counter list for Snover · 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.