Group size estimator

How many trainers do I need to invite?

The Estimator is already "trainers of this attacker needed to finish inside the timer", so this page does not invent a number: it reads it off the boss's own ranked counter list for three realistic parties and re-simulates each of them at every level from 20 to 50.

Raid bossTierIVsWeatherFriendshipDodgingShadow attackersMega attackersLegendary attackers

Invite 3 to be safe — 2 if everyone is prepared

At level 40, a party of Garchomp's top six counters needs 1.50 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 2.06 (round up: 3). The raid timer is 300 seconds and one prepared trainer alone would take 6:55. No level in this range makes it soloable with a prepared party. A duo works from level 30.

Garchomp · Tier 5

dragonground

Weak to

icedragonfairy

Boss CP: 48,751
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Garchomp at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time	Faints per timer
Level 20	3(2.12)	3(2.76)	4(3.30)	12:41	6.0
Level 25	2(1.61)	3(2.17)	3(2.73)	9:59	6.0
Level 30	2(1.25)	2(1.70)	3(2.35)	7:50	6.0
Level 35	2(1.18)	2(1.58)	3(2.18)	7:17	6.0
Level 40	2(1.13)	2(1.50)	3(2.06)	6:55	6.0
Level 45	2(1.11)	2(1.43)	2(1.98)	6:35	6.0
Level 50	2(1.06)	2(1.37)	2(1.92)	6:17	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.

2 trainers at level 40

Kyurem (White)1.13

A prepared party

Each trainer brings the boss's top six counters, powered up and correctly TM'd.

2 trainers at level 40

Kyurem (White)1.13
Kyurem (Black)1.27
Eternatus1.53
Baxcalibur1.65
Mamoswine1.71
Galarian Darmanitan (Standard)1.73

A mixed local group

Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.

3 trainers at level 40

Rayquaza1.96
Aurorus2.00
Avalugg2.02
Mr. Rime1.98
Articuno2.03
Vanilluxe1.98

The party these numbers assume

1. Kyurem (White)

Ice Fang + Ice Burn

2. Kyurem (Black)

Dragon Tail + Freeze Shock

3. Eternatus

Dragon Tail + Dynamax Cannon

4. Baxcalibur

Ice Fang + Avalanche

5. Mamoswine

Powder Snow + Avalanche

6. Galarian Darmanitan (Standard)

Ice Fang + Avalanche

See the full ranked counter list for Garchomp · 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.