their harmless first of all and their usually just little kids looking for a good laugh.so id call them mischevious ghosts.
The name for a ghost that pulls pranks on people is a poltergeist.
The name of the ghost is Prankster Goblin.
Well ghost don't actually prank you they like to freak you out but they are not there to hurt you usually they just want to be friends otherwise a pranking ghost
That would be a poltergeist. Poltergeists are thought by some people to be responsible for rapping noises, other unexplained noises and mischievous behavior such as moving items or making them drop to the floor.
"Riding with Private Malone"
Scare tactics
Is it you have been punked? with Demi Moor 'X Ashton Kushtner
http://www.prankbot.com/modules.php?name=Content&pa=showpage&pid=9
There are thousands of different names for a ghost hunter, but usually they are either called a ghost hunter or paranormal researcher.
heavenhellreincarnationdecaybecome a ghost
Become a Ghost
A Voice From The Grave....?