A Gummi By Any Other Name - S1-E9
Continuity mistake: During most of this episode, Princess Calla wears ragged peasant's clothing. But in the instant where she uses the Changing Hat to transform into Igthorn, she wears her usual princess dress.
A Gummi By Any Other Name - S1-E9
Continuity mistake: First Cavin runs out of the prison tower, then the Gummis (Sunni, Tummi and Grammi), and then Igthorn, each of them smashing the door into the guard's face. But in the instant where the Gummis appear, Princess Calla is missing even though she is supposed to be with them.
A Gummi By Any Other Name - S1-E9
Continuity mistake: When Cavin climbs the wall of the prison tower, he accidentally dislodges a stone which falls onto the helmet of the ogre guard beneath. But in order to do so, it would have had to fall round a third of the tower's width, since Cavin is climbing out of the guard's sight.