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 — 2 if everyone is prepared

At level 40, a party of Ekans's top six counters needs 1.89 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.27 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 8:55. No level in this range makes it soloable with a prepared party. A duo works from level 35.

Ekans · Shadow Tier 5

poison

Weak to

groundpsychic

Boss CP: 16,201
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 Ekans 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(2.40)	3(2.58)	4(3.17)	12:11	5.3
Level 25	3(2.09)	3(2.30)	3(2.75)	10:52	4.9
Level 30	2(1.88)	3(2.07)	3(2.49)	9:45	4.4
Level 35	2(1.80)	2(1.96)	3(2.38)	9:15	4.2
Level 40	2(1.72)	2(1.89)	3(2.27)	8:55	3.9
Level 45	2(1.67)	2(1.84)	3(2.20)	8:42	3.6
Level 50	2(1.60)	2(1.79)	3(2.13)	8:28	3.5

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

Mewtwo1.72

A prepared party

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

2 trainers at level 40

Mewtwo1.72
Hoopa (Unbound)1.82
Landorus (Therian)1.87
Necrozma (Dawn Wings)1.96
Necrozma (Dusk Mane)1.95
Groudon2.03

A mixed local group

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

3 trainers at level 40

Espeon2.19
Latios2.20
Excadrill2.22
Metagross2.23
Garchomp2.26
Azelf2.25

The party these numbers assume

1. Mewtwo

Confusion + Psystrike

2. Hoopa (Unbound)

Confusion + Psychic

3. Landorus (Therian)

Extrasensory + Sandsear Storm

4. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

5. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

6. Groudon

Mud Shot + Precipice Blades

See the full ranked counter list for Ekans · 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.