As popularized by Kamemushi’s devastating footstool combos with Megaman, footstooling someone out of shield can be a fantastic way to punish landing opponents. While it’s not for every character and you can’t expect to just footstool someone every time they land a hit on shield, knowing the correct situation for a footstool out of shield could be the difference between resetting to neutral or taking a stock.
Using Megaman, cFive from the Beefy Smash Doods take viewers through the step by step process of when a footstool out of shield would be a prime punish. In this case, they show how a shielding Megaman could successfully footstool a Sheik who had just landed a miss-spaced forward-air on shield, in order to lead into a Metal Blade kill combo. The amount of variables going into this one interaction shows just how situational a footstool out of shield is–but with fast enough reactions and a misspaced move, it can net you an easy kill.
Following the initial example, cFive then explores how perfect shielding a move can actually make a footstool punish easier to pull off, before finally showing off some setups with characters like R.O.B., Bowser Jr., Diddy Kong, and Ganondorf. A whole lot of information to digest–but if mastered, the footstool out of shield can do serious damage.
Source: Beefy Smash Doods