Help improve it by adding in what you know, or look at the request below for specific details.
The Shadow Glob is a Pureblood Heartless that is found in Kingdom Hearts and Kingdom Hearts 358/2 Days. It is an immobile, black-violet orb of darkness. While it does appear in Kingdom Hearts, it is unnamed, and is only given a name and journal entry in Kingdom Hearts 358/2 Days.
After Oogie Boogie is defeated, his darkness, in the form of Shadow Globs, brought him back to life by fusing the villain with his manor as a giant monster. However, Sora, Donald, Goofy, and Jack Skellington managed to put him down for good by destroying the Shadow Globs that were animating him. Unlike in Days, Shadow Globs are capable of casting Fire against you when near them.
In various missions, Saïx will send you to destroy these Heartless. They are harmless, and they usually stick onto walls and the ground. Few hits shall be enough to wipe this out. Pureblood Heartless tend to appear near them.
As simple as they come, Shadow Globs are semi-spherical, tumorous, black blobs with an inner purple glow. When hit, they wobble much like gelatin.