Group size estimator
How many trainers do I need to invite?
Invite 3 to be safe — 2 if everyone is prepared
- Boss CP
- 27,924
- Boss HP
- 4,000
- Raid timer
- 180s
- 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 | 3(2.15) | 3(2.53) | 4(3.26) | 7:24 | 6.0 |
| Level 25 | 2(1.99) | 3(2.22) | 3(2.80) | 6:30 | 5.9 |
| Level 30 | 2(1.61) | 2(1.98) | 3(2.45) | 5:48 | 5.9 |
| Level 35 | 2(1.43) | 2(1.76) | 3(2.28) | 5:09 | 5.9 |
| Level 40 | 2(1.35) | 2(1.68) | 3(2.14) | 4:55 | 5.8 |
| Level 45 | 2(1.32) | 2(1.61) | 3(2.02) | 4:43 | 5.8 |
| Level 50 | 2(1.27) | 2(1.57) | 2(1.93) | 4:35 | 5.7 |
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.
2 trainers at level 40
- Keldeo1.35
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
2 trainers at level 40
- Keldeo1.35
- Lucario1.62
- Terrakion1.68
- Kartana1.74
- Groudon1.83
- Urshifu (Rapid Strike)1.85
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
3 trainers at level 40
- Necrozma (Dawn Wings)2.06
- Mewtwo2.09
- Marshadow2.12
- Landorus (Incarnate)2.14
- Cobalion2.13
- Galarian Zapdos2.14
The party these numbers assume
See the full ranked counter list for Dialga (Origin) · 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.