Yes, character files (PlXx.dat) can easily be switched now that we can add files to the ISO. I wrote the new alt costumes/PAL chars code in such a way that I could add in a toggle for the SDR character files in like...20 minutes...if I wanted to. The complex part lies in all the "extra DOL mods" that polish SD Remix. Not only the Frame Speed Mod Engine, but the things like land canceling luigi's fireball, and giving Yoshi his jump out of beginning shield and what not. Things like that all need to be toggleable, and on a specific character basis. I mean, it would be much easier to simply have an "SD Remix : On/Off" toggle in the debug menu where all these DOL mods get enabled/disabled together, but I don't want to take the easy way out. I want SD Remix Pichu to be able to play against vanilla Pikachu, for example. It will be a much more complex thing to accomplish, but worth it in the long run and I DO plan on doing it.
I guess this might be a good time to bring this up as well. Because I plan on making SDR toggleable per character at the CSS, there would be no harm in creating modified player files for the top tiers due to their vanilla version always being available. Also Giga Bowser, and Wireframes. The only thing I had in mind for the Fox/Falco player files right now is the shine swap versions for funsies. So if someone wants to work on this...
And, btw, I converted Magus' FSM Engine to 1.02 back in October.
http://smashboards.com/threads/the-...s-new-debug-menu.351221/page-52#post-17696090