Other mistake: When Fievel And Tony reunite on the streets of New York, Tony gets a piece of cheese off of a mouse trap. Watch that piece of cheese, cause Tony throws it up in the air, and you never see it come back down. (00:33:25)
Other mistake: In the first scene when the hurricane has passed and Pazu and Sheeta land on the cloud, Pazu twirls Sheeta around until they are almost off the edge of the cloud (his toe actually is on the edge of the cloud). But in the next few seconds the direction changes and they end up back on the cloud.