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 Litleo's top six counters needs 2.02 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.38 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 9:18. No level in this range makes it soloable with a prepared party. A duo works from level 45.

Litleo · Elite

firenormal

Weak to

fightinggroundrockwater

Boss CP: 24,543
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 Litleo 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(2.35)	3(2.88)	4(3.32)	13:15	6.0
Level 25	3(2.05)	3(2.47)	3(2.89)	11:23	6.0
Level 30	2(1.90)	3(2.22)	3(2.58)	10:13	5.9
Level 35	2(1.79)	3(2.09)	3(2.48)	9:38	5.8
Level 40	2(1.73)	3(2.02)	3(2.38)	9:18	5.7
Level 45	2(1.69)	2(1.95)	3(2.31)	8:59	5.5
Level 50	2(1.65)	2(1.89)	3(2.21)	8:42	5.4

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

Keldeo1.73

A prepared party

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

3 trainers at level 40

Keldeo1.73
Terrakion2.02
Blaziken2.05
Landorus (Therian)2.08
Lucario2.10
Inteleon2.16

A mixed local group

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

3 trainers at level 40

Eternatus2.30
Groudon2.30
Quaquaval2.34
Kingler2.37
Rhyperior2.38
Greninja2.37

The party these numbers assume

1. Keldeo

Low Kick + Secret Sword

2. Terrakion

Double Kick + Sacred Sword

3. Blaziken

Counter + Aura Sphere

4. Landorus (Therian)

Mud Shot + Sandsear Storm

5. Lucario

Force Palm + Aura Sphere

6. Inteleon

Water Gun + Hydro Cannon

See the full ranked counter list for Litleo · 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.