Mission 92: Xion

Mission 92 in Kingdom Hearts 358/2 Days takes place after Roxas leaves Organization XIII. He is faced with the challenge of defeating his former friend, Xion.

Regular Mission
Defeat Xion.

Story summary
Roxas realizes what a fool he was for leaving Organization XIII. A hooded Xion approaches him with sea-salt ice cream at the Twilight Town Clocktower. This time, she reveals to Roxas that it is time she "play her part" and absorb him to further Xemnas's plans.

Mission walkthrough
Day 357 takes Roxas to Twilight Town. Go to the Station Plaza, and save for the last time. Purchase any needed panels at the Moogle Shop near the far edge of the area. Walk up to the tower and choose to head up. A cutscene will play, then the boss battle with Xion's four forms begins.

Challenge Mission
Obtaining three Challenge Sigils is easy, as long as you jump to avoid Xion's attacks.

This Challenge Mission should be easy with the Zero Gear and three Ability Units. Use Limit Breaks to your advantage as to get through the first three battles quickly, and use a Limit Recharge in the fourth battle. Know how to predict Xion's attacks and avoid damage as often as possible.