Group size estimator
How many trainers do I need to invite?
Invite 5 to be safe — 4 if everyone is prepared
- Boss CP
- 39,645
- Boss HP
- 20,000
- Raid timer
- 300s
- Party used
- 6
Trainers needed, by attacker level
Scroll sideways for the mixed-lobby column.
| Attacker level | Six of the best counter | A prepared party | A mixed local group | Prepared solo time | Faints per timer |
|---|---|---|---|---|---|
| Level 20 | 5(4.65) | 5(4.89) | 7(6.43) | 22:30 | 5.8 |
| Level 25 | 4(3.85) | 5(4.29) | 6(5.36) | 19:43 | 5.6 |
| Level 30 | 4(3.50) | 4(3.82) | 5(4.71) | 17:35 | 5.5 |
| Level 35 | 4(3.42) | 4(3.62) | 5(4.48) | 16:40 | 5.4 |
| Level 40 | 4(3.02) | 4(3.40) | 5(4.29) | 15:39 | 5.3 |
| Level 45 | 3(2.98) | 4(3.32) | 5(4.13) | 15:18 | 5.3 |
| Level 50 | 3(2.84) | 4(3.20) | 4(4.00) | 14:43 | 5.2 |
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
- Landorus (Therian)3.02
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
4 trainers at level 40
- Landorus (Therian)3.02
- Groudon3.39
- Zamazenta (Crowned Shield)3.46
- Eternatus3.45
- Zacian (Crowned Sword)3.50
- Excadrill3.57
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
5 trainers at level 40
- Kyurem (White)4.01
- Regigigas4.04
- Keldeo4.10
- Krookodile4.17
- Dialga (Origin)4.21
- Rhydon4.22
The party these numbers assume
See the full ranked counter list for Alolan Muk · 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.