The song has a Kirby-ish sound to me, and something about it just reminds me of NOVA for some reason.
The Nutcracker and the Four Realms - Dance of the Sugar Plum Fairy
The low pitched noise in the background sounds somewhat similar to the sound the Sun makes.
Crazy Backup Dancers - Touhou 16
This sounds like some kind of horror parody.
This scene
was taken from one (courtesy of Smile Pretty Cure!).
Corridors of Time
from Chrono Trigger (as remade by Josiah Everhart ft. Richaad EB).
I chose Xehanort because the fellow Square Enix RPG character's time travelling hijinks went Timey-Wimey Ball. But c'mon, Kingdom Hearts is infamous for its Kudzu Plot.
Edited by dave_the_assassin on Aug 8th 2018 at 6:46:18 PM
Hope: "Let's go. We'll be together." Lightning: "I only know... that soon, we'll be together."
UMP45's backstory is... a bit complex. Let's just say that the whole thing is pretty painful to her.
Susumu Hirasawa - Venus
(Lyrics and translation
)
It just seems to fit. If I had a non-enemy Kirby avatar, I’d use that, but this was the best one I could think of.
Attack! - Kirby: Triple Deluxe
Two Cute Witches are about to punch you! Source
Phantoon’s circling pattern fits quite well with the song.
Last Occultism - Esotericist Of The Present World
I think Ingram's trigger-happy enough to fit the song's manic tempo.
Annalise - Nothing's Gonna Stop Us Tonight
Did you said "remix"? Mike Shinoda will turn that remix into a remix of a remix! (He's done that before)
"Divers" - Finding Nemo Original Soundtrack by Thomas Newman
Edited by dave_the_assassin on Sep 9th 2018 at 7:32:31 PM
Hope: "Let's go. We'll be together." Lightning: "I only know... that soon, we'll be together."
Brass Wings
from Star Ocean: Till the End of Time.
I can see this playing while he trains.
Raise a Little Hell from Bonnie and Clyde
Edited by Spottedleaf on Oct 3rd 2018 at 2:27:40 PM
>^owo^<
Earthbound - Battle Against a Weird Opponent
Edited by Bluethorn on Oct 13th 2018 at 10:06:13 AM
Tbh I never really hated his minigames in the original, but they did make them better in the remake.
Prologue of Darkness
from Mai-HiME.
STRIKE
STRIKE
STRIKE
King - The King Of Fighters XI
Edited by DefRevenge24601 on Oct 16th 2018 at 2:01:39 PM
"DIO is the ultimate being! The being of the future! Dare you not to rival me!"
You can't fool me. That's just a remix of Thardus's theme.
How unfortunate that you are attempting to deceive me.
Quite a few of my avatars fits that, but I'll just choose Cthulhu.
Edited by TheGamechanger on Oct 16th 2018 at 2:53:02 PM
The League of Heroes

The art is from Magnolia, the disc-one final boss song from Deemo. And that is probably a boss track. So I thought it kinda fits.
Taisen 7, Insanity of Dark Arle
"YOU SHALL FEEL THE FLOWER'S WRATH"