Ever since the Smash Bros. Fighter Ballot came out back in 2015, a lot of people wondered if our votes actually mattered. While that's certainly up for debate when it comes to numerous characters, it seems that fans made a difference when it came to King K. Rool.
According to a recent episode of The Kongversation, a DK Vine Podcast, a long-running inside source claims that Nintendo was blown away by the fan support for King K. Rool. They had no idea so many people would vote for him on the Fighter Ballot, thinking the character didn't have much popularity. That groundswell of support was directly responsible for getting the character revived for Smash Bros. Ultimate.