Sergeant

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

Strategy
Battling the Sergeant shouldn't be a challenge. Its large size doesn't help it at all in battle, making it rather easy for attacks to connect. While you may wish to attack repeatedly, this is not advised, as the Heartless will counter after a while with a powerful kick. This is the only attack in this boss' arsenal. It will not attack otherwise. Defeat the Sergeant, and it's Mission Complete.