One of the biggest cons working against the initial release of Nickelodeon All-Star Brawl was the fact that the characters were not voiced. It looks like they have realized the error of their ways and have now added in voice lines for the characters.
The biggest update yet released for the game includes the voice-over lines, new items, and is available for free right now to those on PlayStation, Xbox, and PC. Switch owners will get the update soon....