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 Lucario's top six counters needs 1.52 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.85 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 7:00. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Lucario · Tier 5

fightingsteel

Weak to

fightinggroundfire

Boss CP: 38,763
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 Lucario 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(1.89)	3(2.37)	3(2.77)	10:54	6.0
Level 25	2(1.60)	2(1.91)	3(2.37)	8:47	6.0
Level 30	2(1.48)	2(1.69)	3(2.04)	7:45	6.0
Level 35	2(1.36)	2(1.59)	2(1.93)	7:20	6.0
Level 40	2(1.32)	2(1.52)	2(1.85)	7:00	6.0
Level 45	2(1.26)	2(1.45)	2(1.78)	6:40	6.0
Level 50	2(1.23)	2(1.40)	2(1.71)	6:26	5.9

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

Keldeo1.32

A prepared party

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

2 trainers at level 40

Keldeo1.32
Reshiram1.54
Blacephalon1.54
Terrakion1.54
Landorus (Therian)1.58
Blaziken1.62

A mixed local group

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

2 trainers at level 40

Ho-Oh1.80
Chandelure1.77
Groudon1.80
Conkeldurr1.81
Emboar1.85
Necrozma (Dawn Wings)1.82

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Reshiram

Fire Fang + Fusion Flare

3. Blacephalon

Incinerate + Mind Blown

4. Terrakion

Double Kick + Sacred Sword

5. Landorus (Therian)

Mud Shot + Sandsear Storm

6. Blaziken

Counter + Aura Sphere

See the full ranked counter list for Lucario · 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.