A projectile is an attack or object in the Super Smash Flash series that acts or operates independently from the character who uses it. Common examples of projectiles include Samus's Charge Shot, Mario's Fireball, and thrown items. In Super Smash Flash 2, many projectiles can be reflected, with methods including perfect shields, Fox or Falco's Reflector, Ness' forward smash, or Mario's Cape. In other cases, projectiles can also be completely absorbed, demonstrated by Ness' PSI Magnet or Mr. Game & Watch's Oil Panic.
Most characters have at least one projectile attack while a few have several attacks that create projectiles. Projectiles can aid the player in many ways, such as allowing the player to use projectile camping, which gives the user more time to attack. They also allow the player to attack the opponent from a distance rather than directly confronting their enemies.
In Super Smash Flash, a projectile's damage and knockback can be altered if the player performs another attack while the projectile is still out. For example, if Mario uses his up attack right after using Fireball, the projectile will gain Mario's up attack hitbox stats, causing it to easily instantly-KO opponents. This phenomenon is called projectile augmenting, a term coined by user Dark Ermac.
Using Inhale to copy opponents, Kirby can use all the other characters' standard special moves, including characters with a projectile as their neutral special. Each retains its reflection and absorption properties from its normal user.
Both the Fire Hydrant and the water that shoots from it count as projectiles. The water is both reflectable and absorbable, but the hydrant itself is neither.
Both the bottle of Holy Water and the flames released from it count as projectiles. The bottle is only reflectable, but the flames are both reflectable and absorbable.
A flaw in Super Smash Flash makes it so that only one projectile spawned by a character can be on-screen at the time; launching another one while the former is still visible will cancel out the latter, making it disappear. The sole exceptions are Master Hand's bullets.