Anti planking is a technique to counter planking opponents such as Meta Knight, Pit, and Mr. Game & Watch.
If performed incorrectly, the player may self destruct.
This technique can be executed with Meta Knight and Diddy Kong. Have Meta Knight hang on the ledge. Then Diddy Kong must be shielding at the edge. After letting go in 1 frame, Meta Knight must use his up aerial. It will hit the Diddy's shield on frame 2. Both players will go through 6 frames of shield lag. During the shield lag, Diddy Kong must shield DI off the stage either forward or down diagonally. This can be buffered. After Shield DI is inputted buffer his down aerial. The start up of the attack can be 12 frames, it must hit on frame 13 or earlier. If Meta Knight buffers a second up aerial, he is not invincible.