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 Torterra's top six counters needs 1.05 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.39 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 3:05. A prepared solo becomes possible at level 50. A duo works from level 20.

Torterra · Shadow Tier 3

grassground

Weak to

iceflyingbugfire

Boss CP: 19,554
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 Torterra 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(1.17)	2(1.57)	3(2.04)	4:36	6.0
Level 25	1(0.93)	2(1.34)	2(1.75)	3:55	5.9
Level 30	1(0.81)	2(1.18)	2(1.53)	3:27	5.7
Level 35	1(0.80)	2(1.13)	2(1.45)	3:18	5.6
Level 40	1(0.75)	2(1.05)	2(1.39)	3:05	5.4
Level 45	1(0.73)	2(1.01)	2(1.33)	2:58	5.3
Level 50	1(0.71)	1(0.97)	2(1.28)	2:51	5.0

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

Kyurem (White)0.75

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)0.75
Kyurem (Black)1.00
Baxcalibur1.07
Mamoswine1.13
Galarian Darmanitan (Standard)1.19
Glaceon1.18

A mixed local group

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

2 trainers at level 40

Vanilluxe1.28
Articuno1.35
Avalugg1.36
Kyurem1.38
Salamence1.40
Cryogonal1.40

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Kyurem (Black)

Dragon Tail + Freeze Shock

3. Baxcalibur

Ice Fang + Avalanche

4. Mamoswine

Powder Snow + Avalanche

5. Galarian Darmanitan (Standard)

Ice Fang + Avalanche

6. Glaceon

Frost Breath + Avalanche

See the full ranked counter list for Torterra · 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.