VinnyO is a Japanese-American, rapper, voice actor, musician, and YouTuber. He makes his own rap battles, and has helped out with many other rap battle series. So far, he hasn't had a rapping role in Epic Rap Battles of Cartoons (official or bonus battles), though he did have fully recorded roles in certain scrapped battles were he was rapping.
- Arthur: Lost Episode (Squidward's Suicide vs Dead Bart 2)
- Finn the Human (Finn the Human vs Dipper Pines (scrapped REBOOT))
- Finn the Human (didn't record) (Cartoon Network vs Nickelodeon
- He was originally the voice of Jeff in Clarence vs Harvey Beaks, but the audio was reworked and he was replaced by MarioWorldGuy.