Squanch Games story designer Alec Robbins detailed Justin Roiland's Rick and Morty position before his Adult Swim departure.
Roiland was termed "the heart" of Rick and Morty by Elon Musk, but Robbins said he has only recorded voices since Season 3.
Roiland was dismissed from Adult Swim, Hulu, and Squanch Games for felony domestic abuse.
Roiland's Rick and Morty parts will be recast, while his Hulu series will continue without him, according to Adult Swim.
Since Rick and Morty's early seasons showed Roiland's meagre writing credits, firms may be safe without him.
Roiland's counsel denied media coverage and expressed confidence in clearing his name.
Roiland's firing follows a wave of sexual misconduct allegations against figures in the entertainment industry.
Roiland's behaviour and its impact on his shows have disappointed and alarmed fans and industry professionals.
The entertainment industry is increasingly grappling with the issue of how to hold those accused of misconduct accountable.
Corporations must now assess innovative contributions against project reputation and success risks.