This is a Rom hack of Mega Man III, but with Twilight Sparkle as the playable character. The boss behavior is basically the same, but the levels are redesigned. There's no doc robot stages, and the bosses for each fortress level are the same, just with different attacks. The game is fairly short and easy going. I had very little problems with this.
For whatever reasons, there's no slide move, which is a little annoying when dealing with attacks that were designed with the slide in mind. Unlike Mega Pony, you're walking on two legs, which is a very strange sight for a pony (I guess the programmer didn't know how to retool the sprites and hitboxs for four-legged mode). The weapons are just like those in MMIII, but the Top Spin(given to Rainbow Dash) seems very useless here. Maybe I'm doing it wrong, but it seems to hurt myself more than the enemy, and I couldn't figure out who it was effective against. There's some cases where things are unclear. In Rarity's stage, it's not obvious that the jagged crystals are spikes, and sometimes, it seems like there's a space for a passageway, but it's just a dead end (in which case, they should've put a wall there or something).
Whoever did this is obviously a fan of Castlevania, as enemies and music from that series are present here.
Overall, it's short and easy, but entertaining enough for an hour.