Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 4 if everyone is prepared
- Boss CP
- 38,402
- 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(4.03) | 5(4.68) | 6(5.95) | 21:31 | 6.0 |
| Level 25 | 4(3.29) | 4(3.93) | 5(4.92) | 18:05 | 5.9 |
| Level 30 | 3(2.99) | 4(3.59) | 5(4.28) | 16:31 | 5.8 |
| Level 35 | 3(2.86) | 4(3.31) | 5(4.01) | 15:15 | 5.8 |
| Level 40 | 3(2.76) | 4(3.17) | 4(3.81) | 14:35 | 5.7 |
| Level 45 | 3(2.58) | 4(3.05) | 4(3.68) | 14:02 | 5.6 |
| Level 50 | 3(2.48) | 3(2.93) | 4(3.57) | 13:30 | 5.6 |
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)2.76
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
4 trainers at level 40
- Kyurem (White)2.76
- Kyurem (Black)3.04
- Shaymin (Sky)3.24
- Kartana3.25
- Zarude3.37
- Kyogre3.37
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Primarina3.66
- Chesnaught3.76
- Tapu Bulu3.81
- Kingler3.79
- Greninja3.81
- Decidueye3.80
The party these numbers assume
See the full ranked counter list for Sandslash · 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.