If someone were to use False Swipe on a Shedninja, would it be KO'd or would it just fail? I can greatly assume the answer is " it would just KO Shedninja ", but still I am curious
Shedinja is a Ghost-type Pokémon. It is immune to False Swipe, so the answer is no, it will not EVER KO Shedinja.
False Swipe is a Normal-type move. Normal types don't even effect Ghost Pokémon anyway, so Wonder Guard wouldn't matter.
The move would fail, but if it could hit Shedinja, Shedinja wouldn't faint. So every aspect of it fails on Shedinja.