Editing Mission 73: Defeat Heartless in the Games

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Just like with the challenges from [[Mission 61: Vanquish the Heartless threat|Mission 61]], use a keyblade with the least amount of combo hits such as [[Zero Gear]] to make it easier to use the barrel. If you have [[Crown of Guilt++]], however then you won't need to complete the main game to get Zero Gear as this mission is better suited for magic, than normal combat when compared to Mission 61 and it can also move a barrel in two hits. Filling all the additional gear slots with Magic Units is recommended. For your magic make sure to include Thunder magic, Blizzara, Fire, and Aero at Lv. 5 to help exploit elemental weaknesses (you will need a lot of casts, particularly with Fire and Thunder magic). As Cure cannot be used, stock up on Elixirs to handle healing and restoring magic casts.  

In the '''first round''' use Fire or Thunder magic on the Air Battlers. For Sky Grappler freeze it first with Blizzara, then strike it with Fire to cause additional damage. In the '''second round''' knock the barrels carefully to defeat the cannon heartless. Alternatively if you have High Jump LV. 3, you can get this down quickly by jumping up to their platform and exploiting their elemental weakness with the appropriate magic attacks. For the '''third round''', lock-on, jump, and use Fire to defeat the enemies. The only real hassle is making sure to dodge Switch Launchers' attacks to avoid be transported where it and the Snowy Crystals are. As long as the Snowy Crystals are there it puts Roxas at risk for getting frozen which can waste time. Alternatively, after defeating the Snowy Crystals, use the barrels or attack Switch Launcher directly with regular attacks to beat it quickly. For the '''fourth round''', quickly defeat the Watchers with Thunder magic, then the Ice Cannon with Fire, and just like with the Snowy Crystals, make sure to avoid getting frozen. For the '''fifth and final round''', attack Stalwart Blade with regular attacks until it gets ready to use its charge attack. Block it with Guard to knock it down, then bombard it with its weakness Aero until it is defeated.