"Unveiling the Unconventional: Koji Kondo's Rare Vocal Performance in Super Mario Bros. Wonder"

Koji Kondo, the renowned composer behind Nintendo's iconic tunes, provided a rare vocal performance for a proposed live-action effect in Super Mario Wonder, which would have featured a human-sized Mario humming background music and mimicking sound effects. Although the effect was ultimately cut, Kondo's voice can still be heard in the game's final 'Sound Off' Badge, showcasing his ability to produce sound effects with his voice.