The Index
How rare is rare?
Rarity is computed independently of personality from measurable game data. Five weighted factors produce a raw score, which becomes a dataset-wide percentile.
The five factors
Encounter scarcityweight 35%
species average 20/100
Availability scarcityweight 25%
species average 29/100
Capture difficultyweight 15%
species average 63/100
Special statusweight 15%
species average 8/100
Acquisition complexityweight 10%
species average 18/100
Tier distribution
Common
461 (45%)
Uncommon
255 (25%)
Rare
185 (18%)
Very Rare
92 (9%)
Exceptional
32 (3%)
The rarest of all
Urshifu
fightingdark
Top 1%
Enamorus
fairyflying
Top 1%
Melmetal
steel
Top 1%
Diancie
rockfairy
Top 1%
Hoopa
psychicghost
Top 1%
Volcanion
firewater
Top 1%
Zarude
darkgrass
Top 1%
Zeraora
electric
Top 1%
Meltan
steel
Top 1%
Silvally
normal
Top 1%
Meloetta
normalpsychic
Top 1%
Genesect
bugsteel
Top 1%
Marshadow
fightingghost
Top 1%
Keldeo
waterfighting
Top 1%
Cosmoem
psychic
Top 1%
Phione
water
Top 2%
Magearna
steelfairy
Top 2%
Ursaluna
groundnormal
Top 2%
Naganadel
poisondragon
Top 2%
Crabominable
fightingice
Top 2%
Kleavor
bugrock
Top 2%
Florges
fairy
Top 2%
Basculegion
waterghost
Top 2%
Sneasler
fightingpoison
Top 2%