Phantom Balloon Boy (Fnaf 3)
Phantom Balloon Boy is a dark-green version of Balloon Boy, still with his propeller hat but missing his sign and balloon.
Phantom Balloon Boy will appear on your monitor at random, then appear in your office and jumpscare you.
Thankfully, all you have to do to ward Balloon Boy off is to view a different camera or close the monitor completely. Doing so will prevent a jump scare if you were quick enough.
Phantom Balloon Boy On The Monitor: