The team behind Super Smash Ponies is hard at work trying to emulate the style of the incredibly popular Smash Brothers series, and included in that mix is the music! Some of the more well known orchestral musicians in the fandom have been brought on to pull it off, and both Twilight Sparkle and Rarity already have themes.
On top of that, they have a short gameplay video showing off advanced techniques, including frame cancels and the usual combo system. Head on down past the break for everything!
Twilight Sparkle Theme:
Advanced Combat Video: