In the SNES version of Fatal Fury he gained another special move named 'Dragon Back Breaker' and furthermore he could use that move without the effect of his power drink. In the original Fatal Fury game,В his only special move is the Dragon Kick. He would automatically do this after taking a significant amount of damage (around 1/3). Hwa Jai is only able to perform his special moves after using his 'power drink'. Such drink is a mixture of medicinal herbs and, according to the KOF XIII development team, does not contain alcohol or cola. While Hwa Jai does not have any kind of powers, when he ingests his 'power drink', he gains above average strength, stamina and speed, but seems to lose some reflexes. Considering that Raiden is 'acting' like a villain in order to partake in the tournament, it can't be truly ruled out that Hwa Jai isn't just faking his cruelty in The King of Fighters for the sake of giving Kim something to work on. His friendship with Joe has also been abandoned, thinking that he still needs to defeat his rival in a match. Even though he claims to have changed, he is rather cocky of his skills and is ready to start a fight at any time. His KOF counterpart is rougher than his Fatal Fury counterpart, talking in a more brutal and intimidating manner. Now, he realizes that life isn't about winning and he and Joe support each other all the time. After being defeated by Joe in 1992's KOF, he and Joe eventually became friends. To accomplish that, he must defeat his sworn enemy Joe Higashi.

Hwa Jai longs to be the best Muay Thai fighter there is. He thought Hwa Jai would be one of the most interesting characters for an appearance in KOF, due to his detailed background history and previously lone playable appearance. The producer for KOF XIII stated that he was added to be the 'surprise character' for KOF fans, keeping true to their theme of not always adding popular characters for the newer cast's balance.

Kof 13 tournament