The ratings of Pokémon
Here are the ratings of Pokémon XY&Z:
The first episode of XY&Z series is XY093
XY093
outside the top 10
XY094
outside the top 10
XY095
outside the top 10
XY096
4.2
XY097
4.4
XY098
3.7
XY099
4.2
XY100
outside the top 10
XY101
3.0
XY102
3.5
XY103
outside the top 10
XY104
outside the top 10
XY105
3.9
XY106
outside the top 10
XY107
outside the top 10
XY108
outside the top 10
XY109
outside the top 10
XY110
4.4
XY111
4.0
XY112
4.0
My calculations:
The range of the episodes inside the top ten is from 3.0 to 4.4. About 52.6% of the above 19 episodes are outside the top ten.
Source: anime news network
About the history of ratings:
Top for each Saga:
- Kanto: The Flame Pokemon-a-thon (the highest rated episode)
- Islands: Pokeball Peril
- Johto: (tie) For Crying Out Loud / Charizard's Burning Ambition
- Hoenn: Get The Show On The Road!!
- Kanto 2: Battling the Enemy Within
- Sinnoh: Following a Maiden Voyage!
- The only Kanto episode below 10.0 was Fire and Ice; a Pokemon League episode.
- Only one below a 10.0 in the Orange Islands: Pokemon Double Trouble. That was the last Gym Battle
About the highest rating in the history of Pokémon:
Kanto: The Flame Pokemon-a-thon (the highest rated episode)
About the lowest rating in the history of Pokémon:
Unova: Evolution by Fire! is currently the lowest rated episode in Japan. By a large margin.
The source is this serebii thread:
https://www.serebiiforums.com/showthread.php?604871-Pokemon-Ratings&
The source of the above thread deleted the ratings of the episodes few months ago:
Source:
https://wiki.xn--rckteqa2e.com/wiki/アニメのサブタイトル一覧
About the movies:
The first Pokémon movie is the highest one in Japan and worldwide.
Source:
https://www.boxofficemojo.com/franchises/chart/?id=pokemon.htm
The hoopa movie:
"The movie performed poorly at the box office, grossing only ¥24,040,078,200. It is the lowest-grossing movie of all Pokémon movies, performing worse than the previous lowest-grossing film, Pokémon Heroes: Latios & Latias".
Source:
https://bulbapedia.bulbagarden.net/wiki/M18