When Archer looks at the other Gorgonites on his box, Troglacon is shown after the Gorgonites rebuilt him. He should look the way Erwin designed him.
When Alan and Christy look at the burning wreckage of the commando elite in the water, Christy's jeans are tight. In scenes before and after that, her jeans are much looser.
When Christy is knocked down by the girl dolls and falls onto the floor, her shirt rises slightly to reveal her belly. In the next shot, her shirt is down.
When Alan leaves the toy store after the Commandos destroy it, Link Static watches him leave from a tree across the street. He reports in to Major Chip Hazard, who is so far down the street that he sees Alan biking toward them. However, when the Commandos are about to launch Brick Bazooka from the slingshot, Link Static is pulling on the sling.
When Christy and Alan go to the toy store's back room in the beginning, Christy's hair jumps back and forth over her shoulders between shots.
The MPAA rating screen at the end reads "PG," but the movie is actually rated "PG-13."
Notice across a town street advertising 'October Fest but all the surrounding trees are in full leaf.
A soldier fires 2 flame arrows into the staircase of Christy's house but it doesn't burn down.
At 1:28:50, Irwin says that they have to get into [Christy's] house to "wedge the breakers open." Electrical breakers are considered "open" when turned on, and "closed" when turned off. If they wanted to force the breakers to allow current even when there is an overload, then they would actually want to "wedge" the breakers "closed."
When the chip's designer explains that they're vulnerable to EMP attacks, he sarcastically adds that even the toy industry isn't competitive enough to worry about the effects of nuclear explosions. Irwin and Larry take this literally and think that's the only way to produce one until Fimple explains how electro-magnetism works.
In the Fimple's medicine cabinet, a bottle for Phillip Fimple is next to the Sleep Aid. The bottle is made for pills, but has a label for a cough syrup with codeine, and the word "teaspoons" is misspelled "teaspons".
Very obvious fake hand when Major Hazard stabs Alan's hand on top of the power pole.
As Alan and Christy arrive home on the scooter, they both lean significantly to the side. If they were actually riding the scooter they would have leaned with it, indicating they are sitting in front of a green screen.
Obvious stunt doubles when Kristy and Alan are on the bike.
When the Commando Elite blast the Spice Girls as "psychological warfare," the woofers on the speakers don't move at all. A bass-heavy song at that volume should produce very noticeable travel.
When Christy and Alan are in his father's toy store after the Commandos destroy it, a crew member is reflected in a display case.