Continuity mistake: When Megan and the Ponies are in Muensterville looking for Knight Shade, the mayor of Muensterville traps them in a giant mouse trap. As Lofty flails around she's drawn with three hind legs in some of the frames.
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.