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 1 to be safe — 1 if everyone is prepared

At level 40, a party of Wormadam (Sandy)'s top six counters needs 0.60 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 0.73 (round up: 1). The raid timer is 180 seconds and one prepared trainer alone would take 1:45. A prepared solo becomes possible at level 20. A duo works from level 20.

Wormadam (Sandy) · Tier 3

bugground

Weak to

flyingfirewaterice

Boss CP: 13,070
Boss HP: 3,600
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Wormadam (Sandy) 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	1(0.94)	1(0.85)	2(1.02)	2:29	4.3
Level 25	1(0.71)	1(0.73)	1(0.90)	2:07	3.1
Level 30	1(0.63)	1(0.65)	1(0.79)	1:55	2.3
Level 35	1(0.61)	1(0.63)	1(0.76)	1:50	2.1
Level 40	1(0.56)	1(0.60)	1(0.73)	1:45	1.7
Level 45	1(0.55)	1(0.58)	1(0.70)	1:43	1.6
Level 50	1(0.52)	1(0.56)	1(0.68)	1:39	1.4

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.

1 trainer at level 40

Blacephalon0.56

A prepared party

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

1 trainer at level 40

Blacephalon0.56
Kyurem (White)0.56
Rayquaza0.58
Kyurem (Black)0.60
Reshiram0.62
Salamence0.66

A mixed local group

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

1 trainer at level 40

Cinderace0.70
Staraptor0.71
Heatran0.72
Volcarona0.73
Zamazenta (Crowned Shield)0.72
Blaziken0.73

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Kyurem (White)

Ice Fang + Ice Burn

3. Rayquaza

Air Slash + Dragon Ascent

4. Kyurem (Black)

Dragon Tail + Freeze Shock

5. Reshiram

Fire Fang + Fusion Flare

6. Salamence

Fire Fang + Fly

See the full ranked counter list for Wormadam (Sandy) · 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.