Ghost blocks are glitched tiles that act like the background (ninja does not interact with them). They also hide objects and even normal tiles (with which the ninja does interact). They're one of the most popular and most used bugs in 2.0. The considered uncoverer of ghost blocks is vrugtehagel.

How to make ghost blocks? Edit

There are two tutorials for ghost blocks. The first one was made by their inventor (link). Other one, made by Norkkom is plain and understandable for newer users (link).