Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 30,018
- 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(3.96) | 5(4.29) | 5(4.76) | 19:44 | 6.0 |
| Level 25 | 4(3.34) | 4(3.70) | 5(4.15) | 17:01 | 5.9 |
| Level 30 | 3(2.85) | 4(3.26) | 4(3.73) | 14:59 | 5.6 |
| Level 35 | 3(2.68) | 4(3.11) | 4(3.51) | 14:18 | 5.4 |
| Level 40 | 3(2.58) | 3(2.96) | 4(3.37) | 13:36 | 5.3 |
| Level 45 | 3(2.41) | 3(2.86) | 4(3.27) | 13:10 | 5.0 |
| Level 50 | 3(2.32) | 3(2.74) | 4(3.14) | 12:37 | 5.0 |
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
- Blacephalon2.58
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Blacephalon2.58
- Reshiram2.70
- Cinderace3.05
- Heatran3.10
- Eternatus3.16
- Chandelure3.15
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Ho-Oh3.30
- Moltres3.31
- Emboar3.33
- Rhyperior3.34
- Necrozma (Dawn Wings)3.36
- Kyurem (White)3.38
The party these numbers assume
See the full ranked counter list for Charjabug · 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.