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 4 to be safe — 3 if everyone is prepared

At level 40, a party of Garchomp's top six counters needs 2.88 trainers (round up: 3), and a mixed lobby of ranks 13-24 needs 3.87 (round up: 4). The raid timer is 300 seconds and one prepared trainer alone would take 13:35. No level in this range makes it soloable with a prepared party.

Garchomp · Shadow 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	4(3.79)	6(5.00)	7(6.29)	23:37	6.0
Level 25	4(3.20)	5(4.25)	6(5.25)	20:05	6.0
Level 30	3(2.56)	4(3.49)	5(4.41)	16:28	6.0
Level 35	3(2.17)	4(3.06)	5(4.17)	14:27	6.0
Level 40	3(2.07)	3(2.88)	4(3.87)	13:35	6.0
Level 45	2(1.97)	3(2.70)	4(3.66)	12:44	6.0
Level 50	2(1.88)	3(2.51)	4(3.55)	11:50	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

Kyurem (White)2.07

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)2.07
Kyurem (Black)2.37
Eternatus3.15
Mamoswine3.09
Baxcalibur3.36
Galarian Darmanitan (Standard)3.22

A mixed local group

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

4 trainers at level 40

Avalugg3.64
Mr. Rime3.62
Zamazenta (Crowned Shield)3.77
Garchomp3.78
Aurorus3.95
Vanilluxe3.83

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. Mamoswine

Powder Snow + Avalanche

5. Baxcalibur

Ice Fang + 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.