Revealing mistake: When the first fight starts, the Bloober disappears into thin air. (00:04:52)
Ranma daisuki! Sayonara wa iwanaide!! - S1-E17
Revealing mistake: Ranma catches Shampoo, who drops the bottle she was holding. Ranma picks it up and it turns out it is a fake one, with a #666 label. When the bottle was falling off her hand, the label was #119. (00:10:50)