"After creating UNDERTALE, one of my goals for DELTARUNE was for players to finally be able to challenge a "real" version of Mettaton NEO that didn't just end in one turn. For that purpose, I actually created a few music mockups for an extended version of Power of NEO.

There's even another one from 2016 (lol)

… Unfortunately, try I might, I could never create a full-length version of the song that I was satisfied with. Eventually, the boss concept evolved to involve Spamton, and with that, the music changed as well.

I still like the last half of the song. The guitar section was inspired by Brandish's song "Ending 2". All of it is pretty placeholder though.

It's still fun to imagine fighting something to this... Though, if I was given another opportunity to extend POWER OF NEO, I would probably do something different."

(Unused Track) - DELTARUNE Chapter 2 - ♪ Power of NEO (Unfinished)

Not associated with Toby Fox or his team.

(Unused Track) - DELTARUNE Chapter 2 - ♪ Power of NEO (Unfinished)

UNDERTALE / DELTARUNE Soundtrack Archive