When Kai turned Crane into a jombie, he wasn't wearing his hat. But when Jombie Crane, Jombie Mantis, and Kai arrived at the Jade Palace, Jombie Crane was wearing his hat. Crane was also wearing his hat when he turned back to normal at the end of the movie.
In Kung Fu Panda 2, Tigress said that she didn't feel anything. But in this movie, she felt pain when the arrow stabbed her.
When Kai tossed Po into the air, his fur got dirty when he hit the ground. But when Po took Kai to the Spirit Realm, his fur was clean.
For the UK version, Blue Peter presenters, Radzi Chinuanganya and Lindsey Russell voices the Palace Geese, Mi and Peony. However, the end credits have not been corrected and still list Mike Mitchell and Kelly Cooney as their respective voices. The UK home release added their correct names after the DreamWorks logo fades.
Tigress had no prior knowledge of the location of the panda village, but somehow made it there. When Kai was attacking the temple, Tigress is seen with a scroll about the pandas, which may have helped her find it.
When Oogway fights with General Kai face to face in the Spirit World, he wrote the Chinese character Chi (Pinyin is Qi4) and pushed it to attack Kai. Since the audience (and General Kai) can see this Chinese character in the right way, that means Oogway wrote this Chinese character in the opposite way (like in a mirror), which is awkward. Is Oogway really considerate?
It could be that the shot was added flipped left to right.
It could be that the shot was added flipped left to right.
Mr. Ping mentioned that he raised Po for 20 years before he told Po he was adopted. However, according to director Jennifer Yuh Nelson, Po is in his 20s and according to Kung Fu Panda: Secrets of the Scroll (2016) Po was a teenager 10 years ago. However, in Kung Fu Panda 2 (2011) Shen waited 30 years to rule over Gongmen City alongside his cannon, probably since then he started to use fireworks as a weapon and it's not even mentioned or shown that Shen began to use fireworks as a weapon years before or it was less than 30 years years ago he attacked the panda village and was exiled, although Shifu mentioned Po found inner peace at such a young age.
After Po defeats Kai and the masters are freed, Po and Oogway are in the spirit world talking. Oogway says he's not leaving as he "lives here". Po then asks if he can go back and Oogway says he doesn't know nor has he ever tried. Both should know returning from the spirit world is possible because Kai has already done it.
At the end of the movie, Shifu asked Po to teach him how to master chi, despite the fact that he mastered it earlier in the movie.
When Kai returned to the Mortal World, he told his jombies to find Oogway's students, and bring them to him. Although he was referring to the Furious Five, they were actually Shifu's students, not Oogway's. Shifu, on the other hand, was actually one of Oogway's students.
It's shown in Kung Fu Panda 2 (2011) that Li along with the over Panda's had to hide from Shen as he was killing all of the pandas, so Li and the others made the panda village. In the film Li claims that they can't share the location of the village, as if they didn't know Shen was still alive which made sense and all. But judging how word gets around fast in this world they would've known. Then it's revealed that their village was the panda village in the flashback but how would the pandas know that seeing how Li didn't even know what Chi was until Shifu told them that flashback story? Though even the pandas have no idea what Chi is there would have been no reason for them to hide still even after Shen's death.
Shifu mentions that the dragon scroll prophecy has been around for 500 years, yet Po mention's in the first film that they've been waiting 1000 years for the Dragon scroll to be revealed. And seeing how Po is the biggest Kung fu fan, he shouldn't have been wrong.