Game:Hayner

In both Roxas' and Sora's stories, Hayner is the first person that you fight in the Struggle mini-game.

Strategy
When fighting Hanyer, there is no particular strategy - the best option is to just hit him and run. It is easier to bash him up, parry his attacks and collect all the orbs before he has the chance to regenerate himself. According to Pence, he also lets his guard down a lot and loses his cool easily. A quick way to beat him as Sora is to use magic at a far distance. Another strategy is to work up a larke combo and finish it with explosion.

Trivia

 * Hayner is one of the few characters fought in Kingdom Hearts II thats not directly related to the Heartless, Nobodies, Disney, or Final Fantasy (others include the Hostile Program and the Experiment). He is also one of four boss characters who is not a Heartless/Nobody/Final Fantasy/Disney Character (adding Riku to the aforementioned list.)