Yoshi

Robo Koopa - S1-E52

Revealing mistake: In the first chase scene, the backgrounds are usually repeated in close-up shots, because you can see a sudden jump in the background animation. (00:00:40 - 00:02:25)

Yoshi

Robo Koopa - S1-E52

Revealing mistake: When Bunsun walks up to Dr. Nerdnik to free him, an animation mistake is noticable. Bunsun is far away and she walks up to him, and during this whole sequence her body is in front of Dr. Nerdnik, according to the camera's view. (00:04:55)

Yoshi