User blog comment:Penguin Scorn/A Quest For The Lost Mixamajig-MIXELS WIKI EDITION/@comment-5344911-20151103205133/@comment-4835804-20151103232313

You can hear him say "I'm scared!" when all of the Mixels are captured in the sack. Since Tom Kenny wasn't credited, I'm fairly sure they just took the same exact recording of him saying that in Epic Comedy Adventure.