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 Suicune's top six counters needs 1.69 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.03 (round up: 3). The raid timer is 180 seconds and one prepared trainer alone would take 4:57. No level in this range makes it soloable with a prepared party. A duo works from level 30.

Suicune · Shadow Tier 3

water

Weak to

grasselectric

Boss CP: 19,500
Boss HP: 4,000
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Suicune 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(2.40)	3(2.55)	3(3.00)	7:28	6.0
Level 25	3(2.16)	3(2.14)	3(2.59)	6:15	5.8
Level 30	2(1.93)	2(1.90)	3(2.26)	5:33	5.6
Level 35	2(1.73)	2(1.77)	3(2.14)	5:12	5.5
Level 40	2(1.63)	2(1.69)	3(2.03)	4:57	5.4
Level 45	2(1.60)	2(1.63)	2(1.97)	4:47	5.3
Level 50	2(1.55)	2(1.57)	2(1.91)	4:36	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

Xurkitree1.63

A prepared party

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

2 trainers at level 40

Xurkitree1.63
Regieleki1.68
Kartana1.64
Zeraora1.71
Thundurus (Therian)1.72
Zekrom1.77

A mixed local group

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

3 trainers at level 40

Rillaboom1.93
Kyurem (Black)1.96
Roserade2.01
Sceptile2.01
Decidueye2.01
Tangrowth2.05

The party these numbers assume

1. Xurkitree

Thunder Shock + Discharge

2. Regieleki

Thunder Shock + Thunder Cage

3. Kartana

Razor Leaf + Leaf Blade

4. Zeraora

Volt Switch + Plasma Fists

5. Thundurus (Therian)

Volt Switch + Wildbolt Storm

6. Zekrom

Charge Beam + Fusion Bolt

See the full ranked counter list for Suicune · 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.