>>2217552>>2217554Brass knuckles work because they're just below a joint and, when the hand is folded into a fist, they impact the target ahead of the fingers.
Feet don't work like that. Not human feet, anyway. (Anime anatomy may vary.) In a kick, toecles wouldn't strike before the toes.
I guess I'd have to watch the series or play the games to find out. I shouldn't be too picky if I accept anyone can leap ten meters vertically into the cockpit of a giant mecha.