Ranma o gekiai! Shintaisou no sukeban toujou - S1-E11
Continuity mistake: Kodachi is standing in front of the window spinning her ribbon and creating a storm of black rose petals. Cut to Akane, and Kodachi jumps away off-screen. When Akane stands in front of the window, the mess in the room is much greater (which could be understandable) but the books on her desk have also changed color. (00:14:50)
Ranma o gekiai! Shintaisou no sukeban toujou - S1-E11
Continuity mistake: In the wide shot opening the episode, the girl to the right of the 'mysterious' girl (turning out to be Kodachi) has a bandage on the right knee up to about half her thigh, but it's gone in the next shot. Notice also the girl in the middle not having any band-aid on her left cheek, while she does when Ranma walks in on them after getting ice cream. (00:01:50)
Ranma o gekiai! Shintaisou no sukeban toujou - S1-E11
Continuity mistake: When Akane crouches down to grab the ribbon and attempt to use it, the ribbon itself and the other items on the floor are laid out differently between shots. (00:08:15)
Ranma o gekiai! Shintaisou no sukeban toujou - S1-E11
Continuity mistake: When Kodachi gets a faceful of the door, in the shot from the side the hanger with Akane's uniform is missing. (00:23:55)