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 5 to be safe — 4 if everyone is prepared

At level 40, a party of Mega Dragalge's top six counters needs 3.95 trainers (round up: 4), and a mixed lobby of ranks 13-24 needs 4.89 (round up: 5). The raid timer is 300 seconds and one prepared trainer alone would take 18:09. No level in this range makes it soloable with a prepared party.

Mega Dragalge · Super Mega

poisondragon

Weak to

groundpsychicicedragon

Boss CP: 66,408
Boss HP: 25,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Mega Dragalge 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	6(5.13)	7(6.30)	8(7.52)	29:00	6.0
Level 25	5(4.07)	6(5.10)	7(6.35)	23:28	6.0
Level 30	4(3.52)	5(4.30)	6(5.47)	19:48	5.9
Level 35	4(3.44)	5(4.14)	6(5.18)	19:04	5.8
Level 40	4(3.25)	4(3.95)	5(4.89)	18:09	5.7
Level 45	4(3.17)	4(3.81)	5(4.73)	17:32	5.6
Level 50	4(3.13)	4(3.69)	5(4.57)	16:58	5.6

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.

4 trainers at level 40

Eternatus3.25

A prepared party

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

4 trainers at level 40

Eternatus3.25
Kyurem (Black)3.62
Kyurem (White)3.98
Mewtwo4.22
Baxcalibur4.28
Palkia (Origin)4.33

A mixed local group

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

5 trainers at level 40

Landorus (Therian)4.57
Necrozma (Dawn Wings)4.66
Regidrago4.73
Hoopa (Unbound)4.61
Palkia4.79
Salamence4.83

The party these numbers assume

1. Eternatus

Dragon Tail + Dynamax Cannon

2. Kyurem (Black)

Dragon Tail + Freeze Shock

3. Kyurem (White)

Ice Fang + Ice Burn

4. Mewtwo

Psycho Cut + Psystrike

5. Baxcalibur

Ice Fang + Glaive Rush

6. Palkia (Origin)

Dragon Tail + Spacial Rend

See the full ranked counter list for Mega Dragalge · 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.