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 — 3 if everyone is prepared

At level 40, a party of Jolteon's top six counters needs 2.16 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.69 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:55. No level in this range makes it soloable with a prepared party.

Jolteon · Tier 5

electric

Weak to

ground

Boss CP: 42,459
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 Jolteon 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(2.77)	3(2.96)	4(3.75)	13:37	5.8
Level 25	3(2.29)	3(2.59)	4(3.31)	11:56	5.5
Level 30	3(2.09)	3(2.35)	3(2.98)	10:49	5.4
Level 35	3(2.02)	3(2.23)	3(2.80)	10:16	5.1
Level 40	2(1.95)	3(2.16)	3(2.69)	9:55	5.0
Level 45	2(1.81)	3(2.08)	3(2.62)	9:35	4.9
Level 50	2(1.77)	3(2.02)	3(2.52)	9:19	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.

2 trainers at level 40

Landorus (Therian)1.95

A prepared party

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

3 trainers at level 40

Landorus (Therian)1.95
Groudon2.07
Eternatus2.15
Excadrill2.24
Garchomp2.27
Mamoswine2.27

A mixed local group

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

3 trainers at level 40

Rhydon2.59
Golurk2.61
Kyurem (White)2.60
Keldeo2.66
Mudsdale2.67
Donphan2.66

The party these numbers assume

1. Landorus (Therian)

Mud Shot + Sandsear Storm

2. Groudon

Mud Shot + Precipice Blades

3. Eternatus

Dragon Tail + Dynamax Cannon

4. Excadrill

Mud-Slap + Scorching Sands

5. Garchomp

Mud Shot + Earth Power

6. Mamoswine

Mud-Slap + High Horsepower

See the full ranked counter list for Jolteon · 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.