Continuity mistake: After Ralph destroys the cake and it goes all over the place, we cut to a wide shot. In this shot, to Gene's right, there is a small amount of cake on the floor. In the following shot, the amount of cake has doubled. Also after Ralph destroys the cake Mary is holding the people that were on top of the cake even though Ralph just destroyed them. (00:13:10)
Continuity mistake: When Dex and Dan are flying on the bottle through the town inside the ice-cream products, Dex tells Polar he needs to warn the other Ikes that Brand X is behind the rub-outs. In the shot where Dex says "Bring as many Ikes as you can to the Banana tonight", the area that Polar is standing on appears to be in the sunlight. The shot cuts to a closer shot of Polar, where the area he is standing in appears to be much more shadowed. (00:41:30)
Other mistake: During the cast in the credits, 1st Commercial Guy is misspelled. They put "1st Commerical Guy."
Continuity mistake: At the end of the movie, before the Guardians leave, Jamie rushes over to hug Jack. In the first shot, the top of his head nearly reaches Jack's ribcage. However, in the following close-up shot, Jamie is almost at the same height as Jack's shoulders. (01:27:30)