HOLY SHIT, this remix is a decade old?! Damn! I do believe that this era in the fandom was one of the most exciting times when it came to fanstuff.
In my alternate continuity/view of FiM, this was a fight before Chrysalis revealed her true form, trying to silence Twilight for being “ungrateful” along with bringing an imposter to ruin her perfect day. An RPG style battle in a wedding hall with everypony watching in stunned silence before Applejack questions what exactly everypony just saw and why they are two Cadances.
Chrysalis in this form still fights in the bridal gown.
Chrysalis in this form still fights in the bridal gown.