Continuity mistake: When Kootie Pie is putting up a poster, her cream snout turns orange like her body. (00:02:09)
Continuity mistake: When Yoshi appears with a digging helmet, he has four spikes on his back instead of three. (00:10:27)
The Night Before Cave Christmas - S1-E6
Revealing mistake: When Yoshi licks a candy cane, it is layered over Princess Toadstool, and shortly after, one of the orange spikes on his back turns green like his body. (00:03:54)
Continuity mistake: When the Koopa Troop runs away, the green spikes on the orange dinosaur turn orange, like its body. (00:11:30)
Continuity mistake: When Mario and his friends are about to land on the second platform, the spikes on Yoshi's back are missing. (00:06:36)
Continuity mistake: When Luigi, Yoshi, and the cave people cheer for Mario after he saves Princess Toadstool, the white stripes on Yoshi's tail turn green. (00:10:51)
Continuity mistake: When Luigi and Yoshi start fighting over the stick, the black "L" on Luigi's cap turns green. (00:03:57)
Continuity mistake: When Luigi is about to slip on the ice, the symbol on his cap has its colours reversed, with the "L" being white and the background being black instead of the other way around. (00:05:12)
Continuity mistake: When Mario and Luigi notice Yoshi eating the barbecue, the "M" on Mario's cap has its colours reversed, being white on a red background instead of the other way around. In the same shot, Luigi's legs are missing. (00:02:54)
Continuity mistake: When Kooky is climbing a tree, his orange tail turns white, like the rim of his shell. (00:02:09)
Other mistake: When Kooky's machine throws King Koopa into the cockpit, the top is transparent. (00:08:18)
Revealing mistake: When Yoshi finds the Triangle Block, and when he jumps on it, it overlaps on the house. (00:09:13)
Revealing mistake: When Yoshi hides behind a tree, he is layered in front of and behind it. (00:08:10)
Continuity mistake: When a downward view is shown of Luigi and Princess Toadstool holding onto the stands, the wristbands on Luigi's gloves go from white to blue.