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 5 to be safe — 4 if everyone is prepared

At level 40, a party of Jolteon's top six counters needs 3.58 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.50 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 16:29. No level in this range makes it soloable with a prepared party.

Jolteon · Elite

electric

Weak to

ground

Boss CP: 49,028
Boss HP: 20,000
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	5(4.80)	6(5.06)	7(6.57)	23:17	6.0
Level 25	4(3.87)	5(4.40)	6(5.67)	20:15	5.8
Level 30	4(3.50)	4(3.94)	6(5.02)	18:08	5.6
Level 35	4(3.39)	4(3.76)	5(4.71)	17:17	5.5
Level 40	4(3.28)	4(3.58)	5(4.50)	16:29	5.4
Level 45	4(3.18)	4(3.49)	5(4.38)	16:04	5.4
Level 50	3(2.93)	4(3.37)	5(4.23)	15:31	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.

4 trainers at level 40

Landorus (Therian)3.28

A prepared party

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

4 trainers at level 40

Landorus (Therian)3.28
Groudon3.42
Eternatus3.56
Excadrill3.71
Garchomp3.74
Mamoswine3.80

A mixed local group

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

5 trainers at level 40

Rhydon4.35
Kyurem (White)4.35
Golurk4.37
Mudsdale4.42
Donphan4.44
Ursaluna4.52

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 + Earthquake

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.