The Night Before Cave Christmas - S1-E6
Continuity mistake: When first showing the workshop, the jack-in-the-boxes from left to right are purple, red, and yellow, but when Oogtar is looking at his present, the purple and yellow boxes swap colours. (00:04:27)
The Night Before Cave Christmas - S1-E6
Continuity mistake: When Luigi walks over to the jack-in-the-boxes, the one Oogtar is hiding in is green, but in the next shot, it is yellow, and shortly after, the lid on it disappears. (00:04:41)
The Night Before Cave Christmas - S1-E6
Continuity mistake: When Mario and Yoshi run away from the Koopa Football Players, the orange rims of their helmets turn white, like their mouth guards. (00:09:05)
The Night Before Cave Christmas - S1-E6
Continuity mistake: When Mario says that Oogtar has some explaining to do, the white stripes on his gloves turn blue like his shirt. (00:09:44)
The Night Before Cave Christmas - S1-E6
Continuity mistake: When Oogtar says that he does not deserve a present, Mario's red overalls turn purple. (00:11:02)
Born To Ride - S1-E7
Continuity mistake: When Mario tells Yoshi to stay out of his way while he and Luigi are on a job, his brown hair turns black. This also happens when he and Luigi walk into the Dino Riders' hideout. (00:02:31 - 00:06:55)
Born To Ride - S1-E7
Continuity mistake: When Yoshi licks a caterpillar, part of his pink tongue turns red, like the caterpillar. (00:02:44)
Born To Ride - S1-E7
Continuity mistake: When Duke approaches Yoshi, his brown helmet and grey jacket turn purple, his orange horn turns yellow, and his blue eyes turn red, similar to Rockman. (00:02:56)
Born To Ride - S1-E7
Continuity mistake: When the Dino Riders get on their bikes to chase after Mario and Luigi, Lulu gets on Duke's bike, but in the next shot, she is on her own bike. In the following shot, she appears on Rockman's bike, but when he destroys the Triangle Block, she is back on Duke's. (00:09:31)
Born To Ride - S1-E7
Continuity mistake: When Yoshi high-fives Mario, the number of fingers on Mario's each hand changes from five to four. In the same shot, the white crown on Princess Toadstool's helmet turns yellow. (00:09:51)
Born To Ride - S1-E7
Continuity mistake: When Mario uses a Fire Flower, the white circles around the emblems on his helmet turn grey. (00:10:07)
Born To Ride - S1-E7
Continuity mistake: When Mario and Luigi escape on Lulu's bike, the emblem on Luigi's hat is green, but when they remove their helmets, it is black. (00:10:35)
Born To Ride - S1-E7
Continuity mistake: When Yoshi walks over to his friends while eating some bamboo, the black emblem on Luigi's cap turns white, while the white background turns green. (00:11:36)
Party Line - S1-E8
Continuity mistake: When Mario and Luigi point out that danger is everywhere, the number of fingers they have on each hand switches from five to four. (00:01:02)
Party Line - S1-E8
Continuity mistake: When Yoshi trips on a Block, the black emblem on Luigi's cap turns green. (00:01:18)
Party Line - S1-E8
Continuity mistake: When Mario tells Luigi to call the emergency number, there is no? Block near Luigi, but when Mario tells him to hit one, one appears. (00:05:06)
Party Line - S1-E8
Continuity mistake: While Luigi is Invincible Luigi, the symbol on his cap alternates from flashing to not flashing. (00:06:13 - 00:06:35)
Party Line - S1-E8
Continuity mistake: When Mario is holding off a caterpillar, the white stripes on his gloves turn blue, like his shirt. (00:06:20)
Party Line - S1-E8
Continuity mistake: When Mario and his friends are scared by the giant dinosaur, Princess Toadstool's orange eyebrows turn black. (00:07:31)
Party Line - S1-E8
Continuity mistake: When Mario pulls on the giant dinosaur's tail, its lower jaw changes from orange to purple. This also happens when he is about to launch it into space. (00:08:06 - 00:09:08)