MultiVersus has scrubbed any existence of Justin Roiland's voice work for Adult Swim characters Rick and Morty from the game, replacing them with fresh bespoke voice lines, courtesy of their new actors.
It's worth noting that Roiland didn't actually provide any original voice work for MultiVersus. All lines for both Rick and Morty were cribbed from the TV show despite the rest of the cast having custom voice work done, a good chunk of it coming from each fighter's original voice actor. The reason why was never actually addressed, though most assumed that Roiland was busy with season 6 of Rick & Morty as well as his game High on Life.
If you're wanting to hear what the new Rick and Morty sound like among folk like LeBron James, Mark Hamil's Joker and, uh, Banana Guard, there's not long left to wait. MultiVersus officially relaunches on May 28 with some interesting new PvE missions and fine-tuned combat I much prefer. Street Fighter 6 is launching Akuma by having thousands of Twitch viewers control him simultaneously, which I'm sure will go well