Background Pony #3EC7
And she show him how strong a Alicorn is really are and she knock him out by one punch and what you get underestimate a alicorn , even is your own younger sister.. not forget she be train with her friends Applejack and Rainbow Dash, plus a Alicorn got power of 3 of earth pony, pegasus and unicorn so she a young power house compare to her brother but sure she have still a long way to surpast the other Alicorn mostly Celestia who hve more experience of the 4 Alicorn