Continuity mistake: When Lemmy falls down from the window and running away from Bowser with Iggy, Iggy's face turns orange. Then later, it turns back to green.
Gopher Bash - S1-E9
Revealing mistake: When Mario walks over to Luigi after the flood, his feet pass through the hill he is on. (00:03:38)
Mama Luigi - S1-E13
Continuity mistake: When Mario and Luigi are scared of the Koopa Football Player, the door Yoshi went through closes. (00:08:48)
Mama Luigi - S1-E13
Continuity mistake: When Yoshi is swallowing the Mechkoopas, his lower jaw changes from white to green. (00:09:51)
Mama Luigi - S1-E13
Revealing mistake: At the end of the flashback, Luigi's left hand passes through Mario. (00:10:53)
Mama Luigi - S1-E13
Continuity mistake: When Mario runs over to Luigi, the number of fingers he has on each hand changes from five to four, and shortly after, his black eyebrows turn brown. (00:06:19)
Mama Luigi - S1-E13
Continuity mistake: When Yoshi swallows the Koopa Football Players, their white mouthguards turn orange. (00:08:58)
Mama Luigi - S1-E13
Continuity mistake: When Luigi asks if it was something he said, shoes on Yoshi appear. (00:05:26)
Mama Luigi - S1-E13
Continuity mistake: When Yoshi mentions that he loves caterpillars, the caterpillars' orange noses turn red, like their bodies. (00:05:37)
Mama Luigi - S1-E13
Continuity mistake: Throughout the episode, the number of fingers Luigi has on each hand switches from five to four.
Mama Luigi - S1-E13
Audio problem: After the purple dinosaur says that Yoshi is delicious, its mouth moves without any dialogue being present. In the same shot, its white eyes turn yellow. (00:03:24)
Mama Luigi - S1-E13
Revealing mistake: When Luigi waves goodbye to the dolphins, his right hand passes through Yoshi. (00:04:46)
Mama Luigi - S1-E13
Continuity mistake: When dinosaurs approach Luigi and Yoshi, the purple dinosaur's lower jaw changes from orange to purple, while its purple fingers turn orange. (00:03:02)
Continuity mistake: When Hop says that he and Hip are performing, even King Koopa would be proud of, his green shell turns white, while the white rim turns green. (00:09:12)
Revealing mistake: When King Koopa tries to jump on the Koopalings, he is layered over a Block. (00:09:47)
Continuity mistake: When Yoshi spits out the Koopas, his lower jaw changes from white to green. (00:10:14)
Continuity mistake: When Mario is about to reroute the lava, his sideburns disappear. In the same shot, his mouth moves before any dialogue comes out. (00:10:37)
Continuity mistake: When Hip pops the football, his bag disappears. (00:04:11)
Continuity mistake: When the camera pans to Hip and Hop underground after Mario and his friends walk inside, Hop's green eyelids turn black like his glasses. (00:07:42)
Continuity mistake: When Mario and Yoshi jump over the Koopalings, the yellow rim around Big Mouth's shell turns white. In the same shot, the sound for invincibility can still be heard after Mario is no longer invincible. (00:08:50)