Continuity mistake: When Bentley says how Maple Man can "gobble my knob", he briefly pauses between each word. When Theresa then plays back Bentley's confession, he says "gobble my knob" without pausing. (00:18:58)
Continuity mistake: After their victory, the Turtles are celebrating and partying. Just before the episode ends, Leonardo is dancing on a white mat and doing the moon walk. It cuts to a higher angle and suddenly the white mat vanishes.
Continuity mistake: When Lin lifts the rocks around the house in the final scene, there are eleven of them. But in the last shot, there are only eight rocks.
Weirdmageddon: Part 1 - S2-E18
Continuity mistake: Two guys are throwing a frisbee and it lands on the ground. In the next shot, the frisbee is gone.
Fruit Picking Day/Daniel Is Big Enough to Help Dad - S1-E11
Continuity mistake: The fruit on Miss Elaina's hat changes colors.
Continuity mistake: Before and after the Beetle's battle armor is fried by May Parker activating the jet engine, the appearance and arrangement of the building in the background changes between shots.
Continuity mistake: The window frame is broken in different points throughout the episode. For instance, when Dio pops open the head of the constable, he lands on the frame completely devoid of any sharp part, while a moment before it had two wooden pieces sticking out.
Old Wounds - S3-E6
Continuity mistake: Steve brings Denzel a McRib sandwich and says don't ask how I got it. He shows Denzel his "purple" hand. When Steve takes the sandwich back, the purple color completely vanishes without him wiping it off.