- Koh and Fang was shown as a single being in the form of the 'Slithering Spirit Dragon'. The character served as Aang's spirit guide, instead of Roku.
- Princess Yue was the ruler of the Northern Water Tribe, as her father has passed away.
- Most firebenders needed a source to bend. Powerful benders, such as Iroh, can create their own fire.
- Aang no longer linked-up with the Ocean Spirit in order to defeat the Fire Nation as he used the Avatar State to create a large wave by himself.
- Zhao was killed by four waterbenders.
There are many more differences, but they are not too major.