Continuity mistake: When the dentist wants to put Nemo in a bag, it's a resealable one with a seam at the top. When he finally catches him, it has changed to a normal plastic bag.
Continuity mistake: When Ash tells Flygon to watch out, Salamence’s lower jaw changes from grey to blue. This also happens after Ash tells Max and Pikachu to free Jirachi. (00:55:28)