Nobody has heard of this one. That's the actual tragedy here, a 1994 show where kids weaponize karaoke and the soundtrack becomes part of the combat system instead of just accompanying it. The music doesn't underscore the fights; it is the fight. Light enough to breathe, specific enough that you'll remember the song every time you remember the moment. If you grew up thinking anime could do literally anything with its premise, this is proof that it could, and most of us just weren't there to see it happen.
Karaoke Senshi Mike Jirou is a music TV series from 1994 that ran for 20 episodes. Its premise centers on children who do battle through karaoke, turning singing into a way of fighting.