Continuity mistake: The number of feathers in Zazu's tail repeatedly changes from three to four throughout the film.
Continuity mistake: When the bird bows down at the start, the lion is smiling, in the next shot, he is no longer, and he didn't have time to wipe the smile off his face. (00:01:45)
Continuity mistake: Right after Simba grows into an adult during "Hakuna Matata", Timon walks onto Pumbaa's head and stands directly above his eyes. But once everybody starts singing together in the following shot, Timon has changed position and is now standing behind Pumbaa's black mane instead. (00:47:20)
Continuity mistake: During Pumbaa's flashback scene in "Hakuna Matata" where he joins several other animals by the waterhole for a drink, an elephant with notches on its right ear gets a whiff of him and dashes away. But just before the elephant runs off screen its ear suddenly has no notches, but smooth edges instead. (00:45:05)
Continuity mistake: In one shot during "Hakuna Matata" Timon bites through half of a red and black bug, calling it piquant and pleasantly crunchy. He holds the other half in his left hand, and at first one of its hind legs is noticeably intact. But this hind leg suddenly vanishes as Timon is enjoying the flavor (it doesn't visibly fall off for instance - it simply disappears into thin air). (00:46:30)
Continuity mistake: When the three hyenas (Ed, Shenzi and Banzai) have Simba and Nala trapped in a dark corner of the elephant graveyard, Mufasa suddenly jumps in to save them. After he wrangles the hyenas to the ground, look at how Mufasa's left paw is placed right beside Ed's ear. But in the next shot where they're begging for mercy, Mufasa's paw is all of a sudden positioned further down by Ed's feet. (00:21:40)
Continuity mistake: In the scene where Pumbaa gets jammed beneath a large tree root while trying to avoid being eaten by Nala, Timon runs over and tries to dislodge him from behind. Before Simba appears out of nowhere to pounce on Nala, notice how there's a large weed growing near the root on Pumbaa's left side. But just several shots later when Timon starts cheering Simba on, the weed vanishes. (00:54:25)