The Leap Home (1) - November 25, 1969 - S3-E1
Factual error: The Post Raisin Bran cereal box sitting on the Beckett family breakfast table in 1969 has a 1990s box design. (00:18:00)
Kiss 'N Tell - S1-E4
Factual error: While spinning around dragging Link by the dragon's tail, the dragon blows fire at him and burns his feet, barely. But the way the dragon is spinning, there is no way the fire could have curved that way to get Link's feet. And the fire is also coming at Link's feet from above his head towards his feet, but where the dragon's head is it should be coming from below his feet. (00:04:15)
Robo Koopa - S1-E52
Factual error: Koopa tries to kill the Mario brothers, Bunsun and Dr. Nerdnik by pushing an electric pole at them. Mario and Luigi use a nearby fire hydrant to protect them by having water rush out of it and keeping the pole from crushing them. There is no way a single blast of water can stop a large pole from falling, and the brothers would have been electrocuted as soon as the water hit the pole. (00:07:00)