2: Rarity, Twi and Flutters. 

4: IDK all of them XD Maybe the same as number 2 :3

5: http://www.youtube.com/watch?v=mNrXMOSkBas, http://www.youtube.com/watch?v=w7ETKEczaPY and http://www.youtube.com/watch?v=YF6Eck2XMvo. Yet some of these scenes sould have some Painkiller OST in the background. (Expect for Smile song XD)