A simple sidestep will make it easy for you to dodge it. Timing has to be precise though.
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How to Dodge All Final Smashes.
RandomHaving trouble avoiding Final Smashes all the time? This book will hopefully teach you how to dodge or at least Minimize the Damage you get for every final Smash imaginable for both Smash 4 and Maybe Ultimate. So if your looking to avoid these thing...
Marth/ Lucina
A simple sidestep will make it easy for you to dodge it. Timing has to be precise though.