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 2 to be safe — 2 if everyone is prepared

At level 40, a party of Guzzlord's top six counters needs 1.41 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.72 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 6:30. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Guzzlord · Elite

darkdragon

Weak to

fairyfightingbugicedragon

Boss CP: 30,652
Boss HP: 20,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Guzzlord 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	2(1.98)	3(2.14)	3(2.57)	9:51	5.9
Level 25	2(1.66)	2(1.75)	3(2.17)	8:03	5.8
Level 30	2(1.48)	2(1.55)	2(1.91)	7:07	5.8
Level 35	2(1.39)	2(1.47)	2(1.80)	6:45	5.7
Level 40	2(1.33)	2(1.41)	2(1.72)	6:30	5.7
Level 45	2(1.27)	2(1.36)	2(1.66)	6:15	5.6
Level 50	2(1.24)	2(1.32)	2(1.59)	6:03	5.5

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

Eternatus1.33

A prepared party

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

2 trainers at level 40

Eternatus1.33
Zacian (Crowned Sword)1.37
Enamorus (Incarnate)1.36
Kyurem (Black)1.44
Xerneas1.47
Tapu Koko1.49

A mixed local group

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

2 trainers at level 40

Gardevoir1.63
Xurkitree1.63
Hatterene1.66
Zacian1.70
Granbull1.71
Sylveon1.72

The party these numbers assume

1. Eternatus

Dragon Tail + Dynamax Cannon

2. Zacian (Crowned Sword)

Metal Claw + Play Rough

3. Enamorus (Incarnate)

Fairy Wind + Dazzling Gleam

4. Kyurem (Black)

Dragon Tail + Freeze Shock

5. Xerneas

Geomancy + Moonblast

6. Tapu Koko

Quick Attack + Nature's Madness

See the full ranked counter list for Guzzlord · 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.