Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 41,275
- 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(4.57) | 5(4.61) | 6(5.23) | 21:12 | 6.0 |
| Level 25 | 4(3.46) | 4(3.89) | 5(4.40) | 17:55 | 6.0 |
| Level 30 | 4(3.18) | 4(3.35) | 4(3.87) | 15:25 | 6.0 |
| Level 35 | 4(3.02) | 4(3.10) | 4(3.69) | 14:16 | 6.0 |
| Level 40 | 3(2.84) | 3(2.93) | 4(3.54) | 13:28 | 6.0 |
| Level 45 | 3(2.78) | 3(2.82) | 4(3.37) | 13:00 | 6.0 |
| Level 50 | 3(2.67) | 3(2.73) | 4(3.26) | 12:35 | 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.
3 trainers at level 40
- Kartana2.84
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Kartana2.84
- Xurkitree2.89
- Zekrom2.92
- Zeraora2.93
- Thundurus (Therian)2.97
- Shaymin (Sky)3.02
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Raikou3.41
- Roserade3.43
- Necrozma (Dawn Wings)3.46
- Tapu Bulu3.46
- Regieleki3.51
- Sceptile3.54
The party these numbers assume
See the full ranked counter list for Vaporeon · 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.