The End of Flutter Valley (1) - S1-E1
Corrected entry: As the witches' spell begins the Ponies pause and look around. Sundance (white Pony with pink hair) is standing with the group, yet she does not feature at all in this set of episodes.
The End of Flutter Valley (2) - S1-E2
Continuity mistake: When we first see the Furbobs arguing on the bridge they are coloured orange and pink. When the Bushwoolies run up to them, the orange Furbob is now blue. In a similar problem, Wishful (the purple Bushwoolie) is a tan colour when the camera shows an aerial view and the Ponies approach, but changes back to purple when the Furbobs begin to talk.
Correction: There are lots of movies that show characters that are not primary to the plot line, much like an extra.