Magical Sound Corner [MUSIC]

[PatientZero]

I don't do Famitracker but use FL Studio for soundfont remixes. I don't think they're plausible to be submitted here though (because no-effort music is bit lame/cheap? Though if to be honest these also take some effort to make 'em good...) Also I have a knack on mashups, hahahah-

You could check 'em here, but yeah. I tried to use Famitracker before though but I think it sorta fell off from my head, hahahah-

Just wanted to chime in here since I'm assuming what you're talking about is just grabbing a midi and importing it to get the sequencing data to start with, which is pretty much the only effortless part of doing a decent remix or cover.
You've still really got to know what you're doing, perhaps even more so because when you're done it still has to be recognisable.

Put simply, taking something that someone else has made and just changing the instruments to claim it as your own is pretty uncool, and if that's all you do you'll almost always end up with a mess anyway. (you see this a lot)
Sequencing data (midi files) only have the most basic data in them, what notes to play and when essentially, there's no post-processing, mastering or eq data at all, you have to do that bit yourself.
And even then, you still have to be able to make it distinctive and cover it in style and flair or it's just an imitation of the original anyway.

As a point of reference, this is the remix I did of Vampire Killer from Castlevania, interestingly enough it's was done almost entirely in FL Studio;

The progression, levels, post-processing and rhythm are all different to the original, and if you skip to around 2:25 you can hear where I even added a whole new lead based on the original melody, which is something you really can't do without being able to understand exactly what you're doing.

(for the curious: I just took the original scale and augmented it with more sharps and flats to give it more flavour, playing a sharp melody over a major accompaniment gives it a more jazz or blues feel, that's how I gave it more movement without ever changing the timing or rhythm)

tldr; You can't make a decent remix from a midi unless you know what you're doing.