Continuity mistake: At the very end, when Napoleon asks Deb if she wants to play tetherball, the sprinkler system behind her disappears.
Continuity mistake: When Kipp places the bowl by the tire, the tire is to the left of the bowl with the curb behind it. When a full shot of the van is shown, the view is now opposite with the curb in front of the bowl, but the tire is still to the left.
Continuity mistake: When Napoleon throws the fruit on Uncle Rico's van, it hits the windshield and leaves only splatters of juice on the windshield, but when Rico stops the van, the windshield has several chunks of the fruit on it.
Continuity mistake: When the class president candidates present their program and perform some skit, there are several shots of students sitting in the auditorium. Keep your eye on Deb. She sits in the third row on the left side, but in the first and second shot she isn't there. Then she appears, disappears and finally reappears and changes her position by one seat.
Continuity mistake: When Napoleon arrives at Pedro's house just after he has cut his hair and is sitting on the lawn, his bike is upside-down with the reflector in the shot. When the camera comes back to Pedro, the bike reflector has moved out of the shot.
Visible crew/equipment: When Napoleon is talking to Deb on the porch, as he says, "I made about infinity of those at scout camp," he looks off to the side a bit and you can see crewmembers and a reflector screen standing on the lawn, reflected in Napoleon's glasses.
Continuity mistake: When Deb shoves the box of keychains into Napoleon's arm, between shots the green keychain on the far right disappears.
Continuity mistake: When Uncle Rico and Kip are eating at the restaurant, Uncle Rico's straw goes from straight up to the left and to the right.
Continuity mistake: When Napoleon asks the woman if he can use her phone, the position of the phone's cord changes between shots.
Continuity mistake: When Napoleon is waiting for Uncle Rico, he checks his watch and it says Thursday, July 17. This movie is set during the 2004-2005 school year, as seen on Napoleon's lunch card at the beginning. July 17 was on a Saturday in 2004 and on a Sunday in 2005, not Thursday.
Continuity mistake: When Uncle Rico gives the "Bust Must" demonstration to Starla, he picks up two pots. The bottom of the pot in his left hand is nice and silver, and the one in his right hand is slightly brown, as if it had been burned. In the next shot, the silver one is in his right hand, and the brown one is in his left hand.
Continuity mistake: At the end of the movie when Napoleon is dancing for Pedro's campaign, you can see his boots have mud on them sometimes and sometimes they're clean.
Continuity mistake: When the camera shows the table of egg food, several flies are crawling around the sandwiches. It is highly unlikely that either the flies all at once left their meal in the short time before Napoleon moves to grab a sandwich, but we see no flies fly away when he does so.
Continuity mistake: When Napoleon, Kip, and Grandma are all talking in the kitchen, notice the bag of Tostitos next to the refrigerator. In the close-up shot of Napoleon, the bag's front is facing to where it can be read. Moments later, in the camera view from Kip's perspective, that same bag of chips is now backwards. Then in the next close-up shot of Napoleon, the front of the bag is facing forward again.
Continuity mistake: When Grandma is motorcycling at the dunes, the lines in the sand change dramatically between shots.
Continuity mistake: Napoleon's curls change throughout the movie, as they messed up his perm the first day, and made them too big and loose. If you watch scenes shot on the first day, they are big and loose, but the scenes that were shot later on are much smaller and tighter. This is because they fixed the perm on the second day. I saw this on a DVD.
Continuity mistake: During the first cafeteria scene, Napoleon has tater tots in a perfect pyramid on his plate. When the camera cuts back to him the pyramid is now in a pile.
Continuity mistake: When Napoleon is calling Kip, the position of the phone on the table changes between shots.
Continuity mistake: When Uncle Rico goes alone to see Deb at her studio, she's trying to decide what backdrop to use. Her hands are together and under her chin. She turns to Uncle Rico and drops her hands, but in the next shot they're up again. Then Uncle Rico's gold chain is visible, but not visible in the next shot.
Continuity mistake: When Napoleon and Pedro are eating lunch in the cafeteria Napoleon takes all of Pedro's tots and Pedro is only left with a corn dog. In some shots there is one tot next to his corn dog and in others there is none.
Chosen answer: This is never explained or referenced.