How does this sound? The Fairly Odd Alicorns! Scootaloo as Timmy Turner (she seems to have a crappy life and is kind of reckless) Alicorn!Shining Armor as Cosmo Princess Cadance as Wanda
Seriously though, I think Bulk Biceps should be Jorge, Adagio Dazzle should be Vicky, and Twilight Sparkle should be Mr. Crocker (because of Lesson Zero)