Game:Hayner

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

Fights
Roxas fights Hayner on the 4th Day in the struggle battle as the first battle.

Sora fights Hayner as his first struggle battle you must beat him 10 times to reatch the next level.

Seifer Also fights Hayner in the end credits the results are unknown. (Not Playable)

Strategy
Begin the battle by locking on and backing away. Hayner's attacks consist of two-hit combo followed by a short thrust. Both leave him wide openfor a counterattack. Keep a safe distance and don't stop moving. Wait for Hayner to make the first move. Get a feel for the attack speed, and move in before he has a chance to recover. The best tactic for getting all of Hayner's orbs is to apply pressure. Lead him toward a corner, and race around him to reverse positions. Continue the assault until Hayner is nearly out of orbs, then retreat to collect any that bounce away.

Trivia

 * Hayner is one of the few characters fought in Kingdom Hearts II that's 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.)