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 4 to be safe — 4 if everyone is prepared

At level 40, a party of Mega Houndoom's top six counters needs 3.09 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 3.73 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 14:22. No level in this range makes it soloable with a prepared party.

Mega Houndoom · Primal

darkfire

Weak to

fightinggroundrockwater

Boss CP: 65,923
Boss HP: 22,500
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Houndoom 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(3.66)	5(4.86)	6(5.93)	22:34	6.0
Level 25	4(3.13)	5(4.11)	5(4.87)	19:07	6.0
Level 30	3(2.93)	4(3.52)	5(4.18)	16:20	6.0
Level 35	3(2.68)	4(3.27)	4(3.94)	15:13	6.0
Level 40	3(2.58)	4(3.09)	4(3.73)	14:22	6.0
Level 45	3(2.47)	4(3.00)	4(3.57)	13:57	6.0
Level 50	3(2.40)	3(2.90)	4(3.43)	13:28	6.0

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

Keldeo2.58

A prepared party

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

4 trainers at level 40

Keldeo2.58
Terrakion2.98
Blaziken3.09
Landorus (Therian)3.22
Lucario3.32
Kyogre3.35

A mixed local group

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

4 trainers at level 40

Quaquaval3.60
Primarina3.67
Greninja3.67
Glimmora3.69
Garchomp3.68
Gigalith3.71

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. Kyogre

Waterfall + Origin Pulse

See the full ranked counter list for Mega Houndoom · 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.