Corrected entry: At the end of the movie, Simba is seen swimming with Timon and all his meerkat friends at his waterfall home. However, at the end of the first movie, Simba takes his place as King and Nala gives birth to Kiara. Timon and Pumbaa stay with them, as they are seen in the second movie as well. Simba would not leave after becoming King or after his mate having a cub.
Corrected entry: When Timon and Pumba wash up on their dream island, Timon is so tired that he decides to give up and go home. He is lying on his back holding a flower. When he stands up, he throws the flower to the side. He is far enough away from the water that it wouldn't have washed into (or blown into) the ocean. However, we never see it in any of the next shots showing the beach.
Corrected entry: While Timon and Pumbaa are creeping through the ranks of animals assembled for Simba's birth ceremony, most of the animals aren't moving a muscle. They should at least be shifting their weight slightly, or switching their tailsnot standing like rocks. This is particularly obvious in the row of elephants when seen from the rear. The end result looks extremely fake.
Corrected entry: The animals are dancing and singing "I just can't wait to be king" and right before they fall Pumba grabs Timon into their cave. In the very next shot Timon is shown under the pile of animals. Also (regarding this scene) in the first Lion King the animals fell because Zazu couldn't hold them up, in this movie they fall because Timon pokes them with a stick.