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.
The End of Flutter Valley (2) - S1-E2
Continuity mistake: Since Reeka and Draggle didn't manage to capture, harm and/or kill the Little Ponies, Hydia forces them to eat doughnuts. The doughnuts on the table have the holes coloured in, yet the doughnuts that Reeka and Draggle are holding have transparent holes.
