Continuity mistake: When Mario, Toad and Luigi are driving to the rebel fort, the seatbelts they are wearing disappear for most of the scene. (00:17:30 - 00:18:40)
Kiss 'N Tell - S1-E4
Continuity mistake: When the Witch of Walls grabs frog Link's tongue to inspect it, the first shot shows the hole in the wall from where she came out has vanished, then it's back again in the next shot. In the same two shots, her hands change from being right on top of his hand and left on bottom, to left on top and right on the bottom of Link's tongue. (00:10:25)
Continuity mistake: In season 1 Hobbie was 13 and in season 2 he is 10 years old.
How the Tess Was Won - August 5, 1956 - S1-E5
Continuity mistake: Though he's leaped into someone else, we always see Sam as Sam, dressed in all the host's clothes (including glasses or sunglasses). His host is revealed only in reflections. But here, when he looks at his host-self in the mirror, the hat and clothes are all identical - except that the reflection is wearing glasses, and Sam isn't. (00:43:00)
Continuity mistake: In the shot of the railway bridge after it collapses completely, look closely near the end of the tracks, and you'll see a small flame that was caused by the sparks. But in the next shot of the bridge, the flame has disappeared.