Group size estimator
How many trainers do I need to invite?
Invite 3 to be safe — 3 if everyone is prepared
- Boss CP
- 20,841
- Boss HP
- 15,000
- 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(2.54) | 4(3.01) | 4(3.69) | 14:14 | 6.0 |
| Level 25 | 3(2.24) | 3(2.65) | 4(3.19) | 12:32 | 5.9 |
| Level 30 | 2(1.99) | 3(2.39) | 3(2.87) | 11:17 | 5.8 |
| Level 35 | 2(1.91) | 3(2.27) | 3(2.76) | 10:43 | 5.6 |
| Level 40 | 2(1.86) | 3(2.16) | 3(2.62) | 10:13 | 5.6 |
| Level 45 | 2(1.82) | 3(2.08) | 3(2.55) | 9:49 | 5.4 |
| Level 50 | 2(1.68) | 2(2.00) | 3(2.47) | 9:26 | 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.
2 trainers at level 40
- Keldeo1.86
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Keldeo1.86
- Lucario2.03
- Terrakion2.12
- Blaziken2.21
- Kartana2.34
- Necrozma (Dusk Mane)2.42
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
3 trainers at level 40
- Eternatus2.48
- Marshadow2.48
- Zamazenta (Crowned Shield)2.50
- Mewtwo2.54
- Machamp2.65
- Kyurem (Black)2.65
The party these numbers assume
See the full ranked counter list for Aipom · 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.