Prequel to BURN THE WITCH. 

"Dragons"... from ancient times, they were considered fictional creatures, but they're not actually fictional, nor are they technically creatures. They are heteromorphic beings, and many of the deaths in London can be attributed to them. But most citizens in London don't know what dragons look like or know they even exist. Only those who live in Reverse London can see them. In Reverse London, there was an agency called Wing Bind (WB for short) that was in charge of protecting and managing the dragons. And there were two witches who belonged to Wing Bind...
 
(Source: Crunchyroll)

Short episodes released on the Pokémon Kids TV YouTube Channel.
 
Episodes: 
#1: Scraggy & Mimikyu / Zuruggu to Mimikkyu (ズルッグとミミッキュ), released June 4, 2020. 
#2: The Pancham Who Wants to Be a Hero / Hero ni Naritai Yancham (ヒーローになりたいヤンチャム), released May 5, 2021. 
#3: Blossom's Dream / Yume no Tsubomi (ユメノツボミ), released June 4, 2021. 
#4: Wait for Me, Magikarp / Mattete ne! Koiking (まっててね！コイキング), released July 2, 2021. 
#5: The Slugma-Powered Home / Poka Poka Magumaggu House (ぽかぽかマグマッグハウス), released August 5, 2021. 
#6: Help! I've Turned into a Gengar / Gengar ni Nacchatta!? (ゲンガーになっちゃった!?), released September 10, 2021. 
#7: Snorunt's Summmer Vacation / Fubuki no Natsu Yasumi (ふぶきのなつやみ), released October 8, 2021. 
#8: Jigglypuff's Song / Purin no Uta (プリンのうた), released December 28, 2021.

Historically, 72% of all the deaths in London are related to dragons, fantastical beings invisible to the majority of the people. While unknown to most, some people have been standing up to these dragons. 
 
Only inhabitants of Reverse London who live in the hidden "reverse" side of London can see the dragons. Even then, only a selected few become qualified enough as witches or wizards to make direct contact with them. 
 
The protagonists of the story are witch duo Noel Niihashi and Ninny Spangcole. They are protection agents for Wing Bind (WB), an organization for dragon conservation and management. Their mission is to protect and manage the dragons within London on behalf of the people. 
 
(Source: Official Site) 

Note: The show was screened in theaters and released online on the same date; the theatrical release combines all three episodes into one.

Team Yamahitsuji