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 — 1 if everyone is prepared

At level 40, a party of Rhyperior's top six counters needs 0.97 trainers (round up: 1), and a mixed lobby of ranks 13-24 needs 1.12 (round up: 2). The raid timer is 180 seconds and one prepared trainer alone would take 2:51. A prepared solo becomes possible at level 40. A duo works from level 20.

Rhyperior · Shadow Tier 3

groundrock

Weak to

watergrassfightinggroundsteelice

Boss CP: 23,181
Boss HP: 4,000
Raid timer: 180s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Rhyperior 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(1.46)	2(1.45)	2(1.70)	4:14	5.9
Level 25	2(1.21)	2(1.23)	2(1.44)	3:36	5.9
Level 30	2(1.03)	2(1.08)	2(1.25)	3:09	5.7
Level 35	1(1.00)	2(1.04)	2(1.19)	3:02	5.6
Level 40	1(0.93)	1(0.97)	2(1.12)	2:51	5.3
Level 45	1(0.90)	1(0.92)	2(1.07)	2:42	5.0
Level 50	1(0.88)	1(0.90)	2(1.02)	2:38	4.8

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

Kartana0.93

A prepared party

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

1 trainer at level 40

Kartana0.93
Shaymin (Sky)0.95
Kyogre0.98
Zarude0.99
Inteleon0.98
Rillaboom1.00

A mixed local group

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

2 trainers at level 40

Greninja1.08
Kingler1.09
Chesnaught1.11
Swampert1.13
Samurott1.11
Shaymin (Land)1.14

The party these numbers assume

1. Kartana

Razor Leaf + Leaf Blade

2. Shaymin (Sky)

Magical Leaf + Grass Knot

3. Kyogre

Waterfall + Origin Pulse

4. Zarude

Vine Whip + Power Whip

5. Inteleon

Water Gun + Hydro Cannon

6. Rillaboom

Razor Leaf + Frenzy Plant

See the full ranked counter list for Rhyperior · 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.