Emerald Serenade

The Emerald Serenade is an Emblem Heartless that is found in Kingdom Hearts 358/2 Days.

Design
An Emerald Serenade has a smooth, conical, body covered in vertical stripes that alternate from green to white. Its Heartless emblem is emblazoned on its chest. The top of its body flares outward and forms a jagged "collar" below the Heartless's spherical, pitch black head. It also wears a conical, black hat that is green on the inside and has a jagged brim and a thin, curled tip. Like many Heartless, the Emerald Serenade has glowing yellow eyes. Its seemingly useless feet sport three small, thin toes. The Emerald Serenade is one of the largest Heartless in its family, only contested by the Crimson Jazz.

Like many other Heartless in its family, the Emerald Serenade's name refers to a color—in this case, emerald green, the same as the Emerald Blues—and a musical term—in this case, a serenade, a piece of music appropriate to the evening, characteristically played outside the house of a woman, to woo her.

Strategies
The Emerald Serenade always goes along a specific path, so stay somewhere along its path after studying it. Bring along about five Blizzara/Blizzaga spells and a couple of Fira/Firaga spells. Also, if a partner tags along, change the settings so that they won't do anything to move the Emerald Serenade too quickly by attacking it from behind, or else the strategy will be ruined. First, stay somewhere along the Emerald Serenade's path. Once it comes close, use Blizzara/Blizzaga to try to freeze it. Then use Fira/Firaga to deal major damage. Using Fira/Firaga is also useful even if the Emerald Serenade is not frozen, as it may set the Heartless ablaze, which will slowly deplete its HP for a moderate amount of time. Keep this pattern up until it is defeated.

If you're having trouble with that strategy, an equally effective strategy is to get ahead of the Emerald Serenade and let loose a Thunder once it turns to move towards you. This not only damages it, but also increases the damage dealt by any weapon strikes you can fit in afterwards. If you upgrade Glide to its highest level, it is actually fast enough to overtake the Emerald Serenade, so you actually can follow it while attacking.