Game's not finished so it's not a spoiler if I guess this right :D

Stix final/secret boss? It hit me after I noticed he looks like Leroy from Tekken. Like, it makes sense as he's a drummer, so it could be reflective thematically. The bar's called the Encore, so that matches up with the idea him being a final/secret boss, something in the late game. It's late and I'm not loading up the game to confirm this at the moment so correct me if I'm wrong, but iirc it maths out with the implied story levels left too (I think). Lore-wise it does kinda imply Stix killed Chuckles, and that's the only part of this theory that feels wrong to me. But that could just be a lead in for a good twist.
Normally when I try to predict stuff in media it's about putting a down payment on feeling right. But tbh this is me straight up begging for an instrumental, wing chun, jazz drummer boss battle with Stix just in case the dev's lurk here. (For real, y'all take credit? Firstborns? Do I gotta make a deal with the disco skull? How do we make this happen?)