Group size estimator
How many trainers do I need to invite?
Invite 4 to be safe — 3 if everyone is prepared
- Boss CP
- 50,525
- 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(3.58) | 4(3.80) | 6(5.04) | 17:30 | 6.0 |
| Level 25 | 4(3.04) | 4(3.11) | 5(4.07) | 14:18 | 6.0 |
| Level 30 | 3(2.40) | 3(2.63) | 4(3.55) | 12:07 | 6.0 |
| Level 35 | 3(2.27) | 3(2.44) | 4(3.33) | 11:15 | 6.0 |
| Level 40 | 3(2.11) | 3(2.26) | 4(3.13) | 10:24 | 6.0 |
| Level 45 | 3(2.00) | 3(2.17) | 4(3.00) | 9:59 | 6.0 |
| Level 50 | 2(1.93) | 3(2.06) | 3(2.90) | 9:30 | 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
- Zeraora2.11
A prepared party
Each trainer brings the boss's top six counters, powered up and correctly TM'd.
3 trainers at level 40
- Zeraora2.11
- Thundurus (Therian)2.18
- Xurkitree2.23
- Zekrom2.24
- Regieleki2.35
- Raikou2.45
A mixed local group
Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.
4 trainers at level 40
- Pawmot2.85
- Vikavolt2.93
- Jolteon2.98
- Mewtwo2.98
- Kyurem (Black)3.01
- Manectric3.14
The party these numbers assume
See the full ranked counter list for Gyarados · 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.