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 — 1 if everyone is prepared

At level 40, a party of Sprigatito's top six counters needs 0.99 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 1.21 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 4:33. A prepared solo becomes possible at level 40. A duo works from level 20.

Sprigatito · Tier 5

grass

Weak to

flyingpoisonbugfireice

Boss CP: 17,130
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 Sprigatito 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(1.34)	2(1.39)	2(1.72)	6:23	5.6
Level 25	2(1.13)	2(1.21)	2(1.49)	5:33	5.3
Level 30	2(1.01)	2(1.08)	2(1.33)	4:59	4.9
Level 35	1(0.96)	2(1.03)	2(1.27)	4:44	4.6
Level 40	1(0.92)	1(0.99)	2(1.21)	4:33	4.3
Level 45	1(0.90)	1(0.96)	2(1.17)	4:25	4.0
Level 50	1(0.84)	1(0.92)	2(1.13)	4:14	3.7

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

Blacephalon0.92

A prepared party

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

1 trainer at level 40

Blacephalon0.92
Kyurem (White)0.95
Rayquaza0.98
Eternatus0.99
Kyurem (Black)1.04
Reshiram1.05

A mixed local group

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

2 trainers at level 40

Cinderace1.19
Chandelure1.19
Heatran1.19
Naganadel1.20
Zacian (Crowned Sword)1.20
Darmanitan (Standard)1.21

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Kyurem (White)

Ice Fang + Ice Burn

3. Rayquaza

Air Slash + Dragon Ascent

4. Eternatus

Poison Jab + Dynamax Cannon

5. Kyurem (Black)

Dragon Tail + Freeze Shock

6. Reshiram

Fire Fang + Fusion Flare

See the full ranked counter list for Sprigatito · 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.