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 6 to be safe — 5 if everyone is prepared

At level 40, a party of Palkia's top six counters needs 4.11 trainers (round up: 5), and a mixed lobby of ranks 13-24 needs 5.21 (round up: 6). The raid timer is 300 seconds and one prepared trainer alone would take 19:24. No level in this range makes it soloable with a prepared party.

Palkia · Shadow Tier 5

waterdragon

Weak to

dragonfairy

Boss CP: 54,793
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 Palkia 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	5(4.61)	7(6.04)	8(7.91)	28:31	6.0
Level 25	5(4.20)	6(5.04)	7(6.83)	23:47	6.0
Level 30	4(3.69)	5(4.57)	6(5.90)	21:35	6.0
Level 35	4(3.39)	5(4.18)	6(5.52)	19:45	6.0
Level 40	4(3.35)	5(4.11)	6(5.21)	19:24	6.0
Level 45	4(3.23)	4(3.92)	5(4.84)	18:30	6.0
Level 50	4(3.04)	4(3.74)	5(4.67)	17:40	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.

4 trainers at level 40

Eternatus3.35

A prepared party

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

5 trainers at level 40

Eternatus3.35
Palkia (Origin)4.16
Baxcalibur4.25
Rayquaza4.27
Dialga (Origin)4.26
Haxorus4.35

A mixed local group

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

6 trainers at level 40

Salamence4.87
Tapu Lele4.89
Dialga5.04
Xerneas5.21
Zekrom5.27
Tapu Koko5.23

The party these numbers assume

1. Eternatus

Dragon Tail + Dynamax Cannon

2. Palkia (Origin)

Dragon Breath + Spacial Rend

3. Baxcalibur

Dragon Breath + Glaive Rush

4. Rayquaza

Dragon Tail + Breaking Swipe

5. Dialga (Origin)

Dragon Breath + Roar of Time

6. Haxorus

Dragon Tail + Breaking Swipe

See the full ranked counter list for Palkia · 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.