Plot hole: Whenever Gretchin calls Mikey up to the stand to explain what he saw, he says that he had followed Spinelli and Randall to the wooden fence, where he Saw Randall on his knees in front of Spinelli, begging for forgiveness, then Mikey began running to the other side to stop Spinelli from pummeling Randall with the "rock" but didn't make it in time. We then later find out that Spinelli had actually rescued Ms. Finster's cat out of a tree and Randall hit himself with the rock out of spite. But it is impossible that Spinelli could have given up on hurting Randall, climbed up a tree, rescued a cat, climbed down, handed the cat back to Ms. Finster, gotten praise from Ms. Finster, then have Randall attempt to pick up a big rock, then get a smaller one and hit himself with it in under 3 seconds (the duration of how long Mikey ran before he heard Randall's scream).
Plot hole: Near the end, at the assembly, the old lady sitting on stage can't even lift the turkey. But about 90 seconds later, she's running away from the can pyramid. What a miraculous recovery.
Plot hole: Why did Mikey jump to make the feathers fly if Vince said to abort? When TJ gets hit by the feathers, he's on the 'X marks the spot.' But when he got honeyed, he was nowhere near it. Before TJ gets feathered, He gets up onto his feet, like he had fallen down. But he was still standing when Mikey fired the feathers.
Plot hole: Hustler kid tells Gus in this episode that hustlers never deal in things that could get a kid in trouble. In the episode where all the kids need to become Ashley's he has no problem in handing out plenty of fake IDs, and at the beginning of every show he is shown displaying dodgy merchandise to a kid inside his jacket.(the kid isn't inside the jacket...the merchandise is...).
The Secret Life of Grotke - S4-E32
Plot hole: In the scene where T.J. and his pals are trying to find the password to the building, they are using a cup telephone. When the man talks, they can hear him, but when the kids talk, the men on the other side can't hear them.
Some Friend - S4-E44
Plot hole: They say in this episode that Menlo was always an organized freak. But in "Principal for a Day" it turns out that he was a hyper-major kid until he started working in the school office.