Animaniacs is a show was created by Steven Spielberg and aired from 1993 to 1998. It got a Japanese dub that aired on TV Tokyo from 10 July to 25 December 1996. Only 13 episodes aired out of the 99 episodes in the series. It later aired on Cartoon Network Japan from 1999 to the 2000s. It got a streaming release on Boomerang Japan, but was removed,and there were rumors saying that the dub released to VHS already on DVD we don't have any information, the only information we have is a video of a guy showing some of the dub on VHS with Tiny Toon Adventures
One thing, that's interesting about this dub is the voice acting. The Warner siblings are voiced by prominent voice actors in the anime community.
- Yakko is voiced by Ryusei Nakao (most well known for voicing Frieza in Dragon Ball Z)
- Wakko is voiced by Yū Mizushima (most well known for voicing Napoleon in One Piece)
- Dot is voiced by Ikue Ōtani (most well known for voicing Pikachu in Pokemon)
Only a few audio clips exist online which can be found in this livejournal post: https://keeper1st.livejournal.com/38665.html
Update 09 Jan. 2022 - I'm putting up a little segment of Warners singing to Scratchasniff about etiquette
There are some other audio clips currently synced with footage on YouTube (such as the songs Yakko's World and Yakko's Universe) but episodes in their entirety have yet to be found.
Rita and Runt (Les Miseranimals) clip:
Dot's quip about Madonna:
Passionate Squit (by SnacksToon):
Speaking of Japanese dubbing, a person put some segments in audio form on Google Drive, it can be easier to search the Animaniacs Community (the creator is SnacksToon)
If the link is not working call me on Discord and I will send it again (SnacksToon#4634)