Character mistake: Throughout the entire series, the Turtles are referred to, by others and by themselves, as amphibians. But turtles are reptiles, not amphibians. However they are amphibious, amphibious reptiles.
Hot-Rodding Teenagers from Dimension X - S1-E4
Other mistake: General Traag's weather weapon causes a blizzard across the city, yet when the Turtles and the Neutrinos come up to the surface after the blizzard had been occurring for a while, none of the cars parked on the street, including the Neutrinos' two flying convertibles, are covered in snow. The interior of their cars should have been full of snow.
Audio problem: When Donatello tries to stop April from leaving the sewers after she accuses them of committing the robberies, he is speaking in Raphael's voice. (00:10:35)
Other mistake: The turtles are racing to save April, who is kidnapped by Shredder, and trying to get to the roof. They run into a squad of the royal guards and one of the guards shouts: "Halt! Hands in the air or we'll open fire!" Now, I would like to see that because every one of the guards is holding a sword. (00:14:00)
Deliberate mistake: When the turtles and April escape the building filling up with water, the shot where the hall is filling up with water is used twice.
Revealing mistake: When Donnie is fighting some foot clan solders, his belt has an M on it for a frame.
Revealing mistake: When the channel 6 crew member is telling April they should go, his hand disappears for a frame.
20,000 Leaks Under the City - S3-E14
Continuity mistake: The Octopus grabs Rocksteady, in the next shot on the boat, Bebop disappears and Rocksteady is on the boat.
Continuity mistake: When Bebop's gun is sliced, Raph comes in from the left to knock him out. When he's down, Raph disappears.
Continuity mistake: When Leonardo slices Bebop's gun, he's wearing red.
Chosen answer: The Turtles' pizza obsession was not in the original comics, which were far more adult in the violence and language they contained. Peter Laird, one of the comic's creators was critical of this aspect on his blog in 2012, saying if he had control over the 80s cartoon's creative direction, the Turtles "would not have been so ridiculously obsessed with pizza".
Sierra1