An example of PSA viewing the hitboxes of Ganondorf's down tilt

Project Smash Attacks (Project SA, or just PSA) is a program written by Phantom Wings that allows customization of a character's moveset. All aspects of the animations, hitbox properties, graphic effects, and sound effects of all moves can be altered, as well as those of non-attacks, such as running or jumping. In addition, certain stats of the character can be edited, including number of jumps, running and walking speed, weight, and many others.

PSA can be used to give characters new moves or full new movesets, and when combined with model and texture editing, is the best way to create "new" characters in Brawl.