So I was just watching some episodes and I've noticed in the credits there are always a bunch of voice actors credited as "Additional Voices". I think it would be a good idea to try and identify who those additional voices are (when possible of course). What does everyone think?
While it would be interesting to identify the additional voices, those findings will not be listed unless they're backed up by an official source. As much as we may be convinced that a certain additional voice is portrayed by a certain voice actor, unless that actor or an official related to the show actually confirms that, we can't be sure, and our findings will be categorized as "speculation".