Kirby (SSBM)/Back aerial
Kirby does a backwards drop kick with a relatively long-lasting hitbox and decent knockback, making it one of Kirby's best moves to use. This move is very useful for edgeguarding and it can be used to perform the Fence of Pain (a pseudo version of Jigglypuff's Wall of Pain) on opponents for a guaranteed gimp if done correctly. The Fence of Pain can be extremely useful for using it on characters with poor horizontal recovery, for example Roy or Falco. However, it is less effective against characters with better horizontal recoveries, and against characters like Jigglypuff, it is near ineffective.