The up special move, commonly referred to as up-B, is a special move in Super Smash Flash 2 or Fraymakers that is performed by pressing the special move input while holding up. In Fraymakers, it can also be performed by pressing up on a "Secondary Stick" when assigned to perform special moves.
Most up special moves propel the character upward, with some instead being upward-oriented attacks that can tether onto ledges. This makes them most characters' main recovery moves, though they may also be risky to use due to leaving characters helpless afterward. They are also often powerful attacks while grounded and can be used instantly out of shield.