Game says 0, and in a way that's technically true because it's that MK "you can block, but can't do anything else" stun. After some testing with shinnok it seems to be at least +20, but I'm never sure if my methods are correct. Either way it's VERY clear you're at some advantage (just meterburn throw a dummy set to jump and hold up. Significant lead). Anyone know the exact number?
