Compton Falcor
Smash Rookie
If Diddy jetpacks just past the ledge, then grabs it just as he starts to do his falling jetpack animation, there will be a frame or two where he will be in his ledge hang-position, but upside down and above the ledge. In the photo, you can see his hand glowing green from where he connects with the stage. He's also not flashing white during this time, so I assum he doesn't have ledge invincibility, meaning he could get hit by some fluke attack. when he should have been safe.
http://i.imgur.com/3ojOJhP.jpg
Also, if Lucas Powershield's Lucario's Spirit Bomb, then tries to absorb it with Psi Magnet, the ball teleports to a weird location and starts going at a weird angle. Last time it happens, we were both in the middle of the stage, then the Spirit bomb teleported to the concave part under the ledge of FD, and came out that way at a 45 degree angle. Due to the difficulty of this bug, I wasn't able to recreate it to get pictures.
http://i.imgur.com/3ojOJhP.jpg
Also, if Lucas Powershield's Lucario's Spirit Bomb, then tries to absorb it with Psi Magnet, the ball teleports to a weird location and starts going at a weird angle. Last time it happens, we were both in the middle of the stage, then the Spirit bomb teleported to the concave part under the ledge of FD, and came out that way at a 45 degree angle. Due to the difficulty of this bug, I wasn't able to recreate it to get pictures.