Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 27,026
- 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 | 3(2.90) | 4(3.51) | 5(4.44) | 16:10 | 6.0 |
| Level 25 | 3(2.64) | 4(3.05) | 4(3.78) | 14:01 | 5.9 |
| Level 30 | 3(2.32) | 3(2.71) | 4(3.41) | 12:27 | 5.8 |
| Level 35 | 3(2.21) | 3(2.59) | 4(3.21) | 11:56 | 5.7 |
| Level 40 | 3(2.12) | 3(2.48) | 4(3.06) | 11:24 | 5.6 |
| Level 45 | 2(2.00) | 3(2.38) | 3(2.99) | 10:57 | 5.5 |
| Level 50 | 2(1.97) | 3(2.32) | 3(2.87) | 10:39 | 5.4 |
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
- Keldeo2.12
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Keldeo2.12
- Lucario2.33
- Terrakion2.46
- Blaziken2.57
- Kartana2.60
- Urshifu (Single Strike)2.79
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Marshadow2.96
- Hisuian Decidueye3.00
- Raikou3.00
- Mewtwo3.01
- Kyurem (Black)3.03
- Zamazenta (Crowned Shield)3.02
The party these numbers assume
See the full ranked counter list for Castform · 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.