Here's some additional knowledge about the 1980s version:
Keep Circulating the Tapes: While some episodes were released on VHS in the 80s, the series hasn't had an official full home release since. This is likely because the series was a joint venture between Hanna-Barbera and Tonka (now Hasbro) and thus, rights issues may be at play.
The Other Darrin: Some of the characters have different voice actors in the series than they did in the original 1985 TV special.
Joanne Worley voiced The Nose in the original special. The series changed her name to Nose Marie and had her voiced by Ruth Buzzi.
Howler didn't speak in the original special, but his howls were done by Frank Welker. The series made him capable of speech and had him voiced by Robert Morse.
Nancy Cartwright replaces Adrienne Alexander as the voice of Bright Eyes.
Real-Life Relative: Adrienne Alexander, the voice of Brattina as well as the original voice (in the original 1985 special) of Bright Eyes, was the then-wife of future Warner Bros. Renaissance Agenote the period during The '90s featuring shows such as Tiny Toon Adventures; Animaniacs and Pinky and the Brain among others writer and director Tom Ruegger.
Serendipity Writes the Plot: The reason Captain Slaughter was absent in the second season was because the writers had trouble figuring out what to do with the character and his voice actor Peter Cullen wasn't available.