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 Charmeleon's top six counters needs 2.44 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 2.80 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 11:14. No level in this range makes it soloable with a prepared party.

Charmeleon · Elite

fire

Weak to

groundrockwater

Boss CP: 29,051
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 Charmeleon 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	4(3.29)	4(3.48)	4(3.92)	16:00	6.0
Level 25	3(2.88)	3(3.00)	4(3.39)	13:48	6.0
Level 30	3(2.48)	3(2.66)	4(3.09)	12:16	5.9
Level 35	3(2.43)	3(2.55)	3(2.95)	11:43	5.8
Level 40	3(2.35)	3(2.44)	3(2.80)	11:14	5.7
Level 45	3(2.26)	3(2.38)	3(2.70)	10:58	5.6
Level 50	3(2.12)	3(2.28)	3(2.63)	10:30	5.5

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.

3 trainers at level 40

Landorus (Therian)2.35

A prepared party

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

3 trainers at level 40

Landorus (Therian)2.35
Inteleon2.39
Kyogre2.44
Rampardos2.47
Groudon2.49
Eternatus2.50

A mixed local group

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

3 trainers at level 40

Gigalith2.66
Primarina2.66
Garchomp2.69
Terrakion2.78
Landorus (Incarnate)2.80
Swampert2.82

The party these numbers assume

1. Landorus (Therian)

Mud Shot + Sandsear Storm

2. Inteleon

Water Gun + Hydro Cannon

3. Kyogre

Waterfall + Origin Pulse

4. Rampardos

Smack Down + Rock Slide

5. Groudon

Mud Shot + Precipice Blades

6. Eternatus

Poison Jab + Dynamax Cannon

See the full ranked counter list for Charmeleon · 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.