Continuity mistake: When the gang sees Gus standing next to the tree, T.J. has his backpack on, but when the cops arrive, his backpack vanishes. The straps also change from grey to blue.
Other mistake: When Gus and T.J. are talking on the bench, as Gus says, "No, at least not yet," his watch is missing from his wrist; then it appears mid-shot.
Continuity mistake: When Gus is hiding behind the trees at school, no one is standing behind the fence, but in the next shot, the gang suddenly appears behind it.
Bonky Fever - S4-E30
Continuity mistake: After the gang gives Mikey his backpack full of Bonky stuff, Mikey runs away from them, and he is heading towards two kids playing marbles. Then, when Mikey slips on the marbles, they have changed colour.
Bonky Fever - S4-E30
Continuity mistake: In the cafeteria, Mikey asks the lunch lady for more pudding for Bonky. When the lunch lady refuses, the clothing on Mikey's Bonky puppet has vanished, then it reappears in the next shot.
Bonky Fever - S4-E30
Continuity mistake: When the gang arrives at Mikey's house with his birthday gifts, note the colours of the gifts that Gretchen and Gus are holding. When the gang looks at Spinelli's gift, Gretchen and Gus's gifts have swapped colours, then they swap back in the next shot.
Bonky Fever - S4-E30
Continuity mistake: After the gang finds out that Mikey was sucking on a Bonky pop, they find his backpack, which is its usual green colour. Then, when they discover all of the Bonky stuff inside it, it has changed to red.
Schoolworld - S4-E21
Continuity mistake: The door to Miss Grotke's classroom opens inward throughout the episode. However, when SAL mimics Principal Prickly and tells all the teachers to report to his office, Miss Grotke leaves the classroom, and the door now opens outward. Then, when the kids look outside the classroom, the door has completely vanished.
Continuity mistake: At Parents' Night at the school, the doorknob is on the left side of the door to Miss Grotke's classroom. Then, when Spinelli and her "parents" go out of the classroom, the doorknob is on the opposite side, then goes back to the left side in the next shot. (00:07:34)
Other mistake: When Spinelli's real parents arrive at Parents' Night, the shot is flipped: the potted plant and poster are on the opposite sides, the letter on the poster is mirrored, the door opens the opposite way, and Spinelli's parents are running in the wrong direction. (00:08:26)
Continuity mistake: After T.J. and Vince walk out of the school while mocking Mademoiselle, it cuts to a shot of the rest of the gang, and Spinelli is standing behind Mikey. Two shots later, Spinelli has vanished from behind Mikey, then reappears a moment later.
Continuity mistake: When the boy in the blue shirt tries to make an appointment for a haircut, the book on Gus's desk is blue, but when the kid leaves, it changes to green.
Continuity mistake: At lunch, when the kid tells the gang that Spinelli's parents will be the first parents on the space shuttle, Gretchen's sandwich is in front of her on the table. In the next shot, it changes orientation. (00:02:47)
Other mistake: When Spinelli's real parents arrive at Parents' Night, as Spinelli's mother tells Miss Grotke, "She just stopped wetting the bed this year," her necklace vanishes, then reappears mid-shot. (00:09:23)
Other mistake: When Mikey enters the dance class and Spinelli says, "Mikey?", the letters on the door to Mademoiselle's office are mirrored; the background is flipped in this shot.
Continuity mistake: When T.J. walks out of the school while mocking Mademoiselle, he is not wearing his backpack, but in the next shot, he is.
Other mistake: At lunch, when the kid tells the gang that Spinelli's parents will be the first parents on the space shuttle, Gus's right elbow vanishes, then reappears mid-shot. (00:02:42)
Continuity mistake: When the gang is first shown talking about Spinelli's parents at the lunch table, T.J. is holding his sandwich in his right hand, but in the next shot, it's in his left hand. (00:02:26)
Other mistake: When the Ashleys are first shown playing jacks, Ashley T's nose seems to be missing; then it reappears three shots later.
Continuity mistake: When the gang is playing marbles, there are seven marbles in the ring, with three black ones on the left and four orange ones on the right. In the next shot, there is suddenly a green marble on the right side of the ring, with a black marble next to it.
