Continuity mistake: When Pleakley is tipped out of the chest, he is accompanied by lots of Lilo's toys. When Stitch activates the pod, the toys have vanished from the floor around Lilo and Pleakley's feet. (00:15:15)
Continuity mistake: When Nani leaves, there is one of Lilo's drawings pinned to the bookcase next to the door (a face). When the "pizza" arrives, there are two (a person and a plant). (00:07:15 - 00:08:05)
Continuity mistake: When Hamsterviel first stands on the pile of books to reach Jumba, it is 19 books higher. Later on, when Jumba is talking on the phone, it is only 13 books high. (00:24:35 - 00:29:50)
Plot hole: When 625 is activated, he has nothing with him, so how does he make all those sandwiches out of nothing?
Continuity mistake: The direction in which the lighthouse light rotates changes. When it first is powered up it rotates anti-clockwise. As the film's end credits start it is rotating clockwise (as viewed from above). (00:54:40 - 00:57:30)