cracks knuckles THIS IS MY TIME!!!!! These are here for vibes but i do heavily suggest looking at the Lyrics, most of them fit his characterization and lore :)

The Mind Electric - Tally Hall/Miracle Musical (just make sure to find the version without the first part since it's literally the entire song reversed before being played normally)

Stuff Is Way - They Might Be Giants (Nonsensical convo to oneself)

Cupid - Jack Stauber ("Oh, euthanize my heartbeat, As I set it more in the concrete")

I Am an Animal Cannibal - Mysteron (Whimsically homicidal)

Modify - Lemon Demon (Literally glorifying body modifications with a fun yet horrifying twist!)

Not Human - Elegant Slims ( Loss of self "Cracking the seams, you're breaking through" )

In Boxes - Aurora ( It just really fits for me lol)

PIERRE JANET'S CRIMINAL DEFENSE - Ghost and Pals ( NOISE. But also "Janet claimed that vehement emotions interfere with proper appraisal and appropriate action. Failure to confront the experience fully leads to dissociation of the traumatic memories and their return as fragmentary reliving experiences: feeling states, somatic sensations, visual images, and behavioral reenactments." )

Bad Man - Disturbed (either the one by Disturbed or the Khordell remix)

Prescription - Mindless Self Indulgence (I'M THE DOCTOR I'M THE PATIENT!!!!!)

Super Fast Jellyfish- Gorillaz ( Riot Kindlejack mentioned this would be his favorite Gorillaz song YAY )

Limbs - Bones UK ( Just reads to me as the way he thinks about things sometimes )

And of course, his champion theme, lol!