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 Nidorino's top six counters needs 2.06 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.48 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:30. No level in this range makes it soloable with a prepared party. A duo works from level 45.

Nidorino · Elite

poison

Weak to

groundpsychic

Boss CP: 24,129
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 Nidorino 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(2.66)	4(3.05)	4(3.55)	14:02	5.8
Level 25	3(2.29)	3(2.52)	4(3.06)	11:36	5.6
Level 30	3(2.05)	3(2.27)	3(2.72)	10:26	5.5
Level 35	2(1.93)	3(2.17)	3(2.60)	9:59	5.4
Level 40	2(1.86)	3(2.06)	3(2.48)	9:30	5.3
Level 45	2(1.80)	2(1.99)	3(2.39)	9:10	5.2
Level 50	2(1.73)	2(1.94)	3(2.29)	8:56	5.1

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

Mewtwo1.86

A prepared party

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

3 trainers at level 40

Mewtwo1.86
Hoopa (Unbound)2.00
Landorus (Therian)2.08
Necrozma (Dusk Mane)2.08
Necrozma (Dawn Wings)2.11
Lunala2.26

A mixed local group

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

3 trainers at level 40

Espeon2.36
Zamazenta (Crowned Shield)2.38
Metagross2.41
Excadrill2.45
Zacian (Crowned Sword)2.45
Azelf2.44

The party these numbers assume

1. Mewtwo

Confusion + Psystrike

2. Hoopa (Unbound)

Confusion + Psychic

3. Landorus (Therian)

Mud Shot + Sandsear Storm

4. Necrozma (Dusk Mane)

Psycho Cut + Sunsteel Strike

5. Necrozma (Dawn Wings)

Psycho Cut + Moongeist Beam

6. Lunala

Confusion + Psychic

See the full ranked counter list for Nidorino · 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.