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 6 to be safe — 5 if everyone is prepared

At level 40, a party of Suicune's top six counters needs 4.29 trainers (round up: 5), and a mixed lobby of ranks 13-24 needs 5.15 (round up: 6). The raid timer is 300 seconds and one prepared trainer alone would take 20:15. No level in this range makes it soloable with a prepared party.

Suicune · Shadow Tier 5

water

Weak to

grasselectric

Boss CP: 37,761
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 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	7(6.88)	7(6.63)	8(7.69)	31:18	6.0
Level 25	6(5.65)	6(5.60)	7(6.60)	26:28	6.0
Level 30	5(4.76)	5(4.83)	6(5.81)	22:49	6.0
Level 35	5(4.79)	5(4.59)	6(5.38)	21:40	6.0
Level 40	5(4.11)	5(4.29)	6(5.15)	20:15	6.0
Level 45	4(3.97)	5(4.14)	5(4.96)	19:33	6.0
Level 50	4(3.77)	4(3.97)	5(4.82)	18:45	5.9

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.

5 trainers at level 40

Regieleki4.11

A prepared party

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

5 trainers at level 40

Regieleki4.11
Zeraora4.17
Kartana4.22
Zekrom4.37
Xurkitree4.41
Thundurus (Therian)4.45

A mixed local group

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

6 trainers at level 40

Raikou4.83
Rillaboom4.99
Sceptile5.04
Magnezone5.09
Roserade5.10
Zapdos5.11

The party these numbers assume

1. Regieleki

Thunder Shock + Thunder Cage

2. Zeraora

Spark + Plasma Fists

3. Kartana

Razor Leaf + Leaf Blade

4. Zekrom

Charge Beam + Fusion Bolt

5. Xurkitree

Thunder Shock + Discharge

6. Thundurus (Therian)

Volt Switch + Wildbolt Storm

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.