Report:20241019001
From The Lost Media Wiki
Monster Tails (partially lost Hanna-Barbera animated series) was partially found on 18 Oct 2020 by Sloan's TV Airchive
This episode of Monster Tails [1] [2] aired as part of the United Kingdom's The Big Breakfast. It begins at the timestamp 23:00 [3].
I also know of another episode of Monster Tails aired on that show, discovered by Adam Beckwith [4]. It begins at the timestamp 10:09.
References
https://hanna-barbera.fandom.com/wiki/Monster_Tails
https://www.behindthevoiceactors.com/tv-shows/Monster-Tails/