Mystery at the Lighthouse - S1-E13
Continuity mistake: When Ash asks Professor Oak if Krabby is all right, Professor Oak's coat goes from white to red with the pot going from brown to grey. Additionally, the background changes design between shots. Furthermore, a bowl, a ladle, and a spoon go from being present to vanishing. Moreover, the camera view goes from being aligned with Professor Oak to not with his left-hand going from being lowered to being raised. (00:08:51)