SFE and music help

So while I’m recreating Apocalypse, and I got the sound file for it, but I’m not sure how insertion works with SFEs and music, along with magic SFE scripting in animation.

Some soundtracks I have in mind (like SSBB remix of Encounter, SSBU of Gang Plank Galleon, Soundtracks from pokemon games, and more) that I want in the romhack, but I don’t know how to convert soundtracks to other games, I need some help.

there’s numerous music insertion tutorials on the site. have you tried searching for these?