Mission 61: Vanquish the Heartless threat

Mission 61 in Kingdom Hearts 358/2 Days sends Roxas and Demyx to Olympus Coliseum to exterminate a Guard Armor Heartless in the games.

Summary
''An unidentified giant Heartless has surfaced in Olympus Coliseum. Team up with Demyx, find it, and eliminated it at once.''

Objectives

 * Track down the unidentified giant Heartless!
 * Enter the Games and locate the giant Heartless!
 * Round 1! Defeat all the Heartless!
 * Round 2! Defeat all the Heartless!
 * Round 3! Defeat all the Heartless!
 * Round 4! Defeat all the Heartless!
 * Round 5! Defeat Xigbar!
 * Defeat the Guard Armor!

Story summary
Roxas and Demyx are sent to Olympus Coliseum to eliminate the Guard Armor in the games, but Roxas encounters a familiar, scarred face in the semi-final match.

Mission walkthrough
Defeat the Heartless appearing outside the Coliseum, then enter the Vestibule. Phil informs Roxas that the games have already started. The only way to enter the Coliseum and search for the Heartless is to enter the games. Speak to Phil again when your ready. The objective is to defeat five rounds of enemies. Using the barrels or not to achieve this is totally up to you. Remember, hitting an enemy with a barrel is an instant defeat. Round four features a Tailbunker that is harder to bring to the ground then usual. Jump onto the top platform and knock barrels into it to inflict severe damage and ground it. Follow this up with a quick combo before it rises, once it does rise into the air, repeat the process until your victorious. Now, to defeat the Heartless threat!

...Or not, turns out Xigbar decides that he wants to test Roxas's strength. Don't waste all your healing items and magic spells on Xigbar, he surrenders once his HP has been depleted by half. After Xigbar, the real target shows up: the Guard Armor. Brace yourself for a long battle if you're not fast. After the Guard Armor is defeated, RTC.