Watch the massive (mind-blowing) making of Psychonauts documentary, for free, right here Jack Black Is ~INTO IT~. [HOST] › title › characters. Psychonauts 2 OST - Brain in a Jar (ft. Jack Black). views · 6 months ago. 1 Jack Black as Helmut Fullbear Of course, it's impossible to forget about Jack Black. It is sung in-universe in the PSI King's. Jack Black has a really recognisable voice and it often feels like he overdoes things even though I imagine he's just doing what comes naturally. Psychonauts 2 has released recently and here is whether Jack Black will be in the game or not, and what role he plays. He's known for a number of things, depending on who you. Jack Black not only plays a character in Psychonauts 2 but also provides a musical performance for one of the game's trippiest levels. Cosmic I/Smell The Universe is a song in Psychonauts 2. . Black. Psychonauts 2 (Video Game ) Jack Black as Helmut Fullbear.