Mission 74: Search for the impostor

Mission 74 in Kingdom Hearts 358/2 Days sends Roxas and Axel to Twilight Town to track down the Organization impostor.

Regular Mission
Search for the Impostor.

Story summary
Roxas and Axel must look for the Organization impostor who was sighted near Castle Oblivion. However, Roxas faints when they enter the castle and Axel takes him to Twilight Town. It is there where they meet the impostor.

Mission walkthrough
Follow the impostor into the underground. Striking the impostor causes him to vanish from one location and reappear elsewhere. Look for the orange-red colored dot to appear on the in-game map to determine his next location. He doesn't attack back, so there's nothing to fear. When he finally appears by the south blue gate, he moves to the Tunnel.

Enter the Tunnel and chase the impostor from the southeast corner into the main room and back again. When the impostor slips through the south gate and out of Twilight Town, it's time to call it a day and RTC.

Challenge Mission
While the imposter can be tracked on the map, he will block many of your attacks, wasting your time. In order to get past his defense and damage him, bring multiple casts of Aeroga.

Also, equip abilities to boost your mobility, such as Haste, Glide, and Air Dash, leveled up if possible. Since you can't recover your health normally, equip Auto-Life to regain your HP if it runs out. Also note that the Second Chance ability will keep you from dieing because of the HP drain. However, it won't protect you from Heartless attacks.

Video walkthrough
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