Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 36,891
- 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 | 4(3.94) | 5(4.31) | 6(5.20) | 19:49 | 6.0 |
| Level 25 | 4(3.45) | 4(3.62) | 5(4.50) | 16:39 | 5.9 |
| Level 30 | 4(3.12) | 4(3.25) | 5(4.01) | 14:58 | 5.7 |
| Level 35 | 3(2.94) | 4(3.10) | 4(3.83) | 14:16 | 5.6 |
| Level 40 | 3(2.79) | 3(2.96) | 4(3.63) | 13:38 | 5.6 |
| Level 45 | 3(2.67) | 3(2.84) | 4(3.51) | 13:04 | 5.4 |
| Level 50 | 3(2.61) | 3(2.74) | 4(3.39) | 12:38 | 5.3 |
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
- Kyurem (White)2.79
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Kyurem (White)2.79
- Blacephalon2.90
- Eternatus2.97
- Rayquaza2.93
- Kyurem (Black)3.06
- Reshiram3.12
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Heatran3.52
- Cinderace3.56
- Zamazenta (Crowned Shield)3.60
- Ho-Oh3.61
- Galarian Articuno3.61
- Zacian (Crowned Sword)3.61
The party these numbers assume
See the full ranked counter list for Bellossom · 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.