Emblem Heartless contain and release hearts when defeated by the Keyblade. Purebloods, like Shadows, don't release hearts.
They are Pureblood, meaning they are the original Heartless that weren't people missing hearts. They are monsters such as Darksides and Shadows that never needed a person without a Heart.
Only the Emblem Heartless (the ones marked with the red-black heart) release hearts when destroyed by a Keyblade.
Pureblood heartless release no hearts when you defeat them. While Emblem heartless ( the ones with the heart with the X mark) actually releases hearts and in 358/2 days, Roxas collects those hearts.
As Axel explained to Roxas, Heartless that are destroyed not by the Keyblade regenerate back into Heartless. However, the Keyblade has the power to release the hearts to Kingdom Hearts.
A Heartless is a fictional enemy in the video game Kingdom Hearts. The Heartless are emotionless and empty creatures that devour worlds and embody everything that is darkness. There are two different kinds of heartless:Pureblood Heartless and Emblem Heartless.Pureblood Heartless are the most common, but have a small range of species. Common pureblood heartless include Shadows, Neoshadows and certain bosses like Darkside. Pureblood Heartless do not release hearts, unlike the Emblem Heartless. When a Heartless is destroyed, it's heart gathers with other hearts into an entity known as Kingdom Hearts, which is often used by the antagonists of the game.Emblem Heartless are a sort of artificial Heartless that have a symbol of a heart located on their body. They have a wide variety of species. The Emblem Heartless must be destroyed by the Keyblade, otherwise the hearts they release will gather back into Heartless again.
Sora did himself. When Kairi's heart left her body, because it had no darkness considering she was a Princess of Heart, instead of becoming a Heartless her heart entered Sora's heart. In order to release her heart Sora stabbed himself with the Keyblade of People's Hearts, a Keyblade created out of the hearts of the Princesses of Heart by Xehanort's Heartless, releasing Kairi's heart back into her body. However, it also released Sora's heart, which became a Heartless, so he did it to himself to save Kairi.
They are the actual Heartless. The "Emblem Heartless" were made by Ansem the Wise.This is one of Ansem's Reports.Ansem Report 8 - Win the Hades Cup in The Olympus ColiseumThere is no doubt that the Heartless are deeply connected to the people's hearts. Further study may unravel both their motivations and the mysteries shrouding the heart.As a start, I have built a device that artificially creates Heartless. By recreating the conditions that spawn the Heartless naturally, I should be able to produce them artificially. This device is the culmination of all my research thus far. The machine's test run successfully created a Heartless.This may be a step toward creating a heart from nothing. The artificially and naturally created Heartless showed nearly identical traits. But the two types remain distinct for the purpose of the experiment. So, I will mark the ones that are created artificially.
The Heartless Machine - 2013 was released on: USA: March 2013
Heartless Husbands - 1925 was released on: USA: 5 October 1925
Heartless - 1997 TV was released on: USA: 5 November 1997
Kingdom Hearts III: The Keyblade Wars is a fan made cover desgin.It is not a real game.
Martial Law - 1998 Heartless - 2.19 was released on: USA: 22 April 2000