I'm having trouble with Ky's challenge number 18. Seems you need a dash to land the kick, but I keep getting the 6k instead of the 5k. And if I wait longer, it ends up being too slow to work.
I had oodles of trouble with this one as well. The key is timing the dash input correctly. You need to be throwing it out before your last move completes so you get the quick dash without doing the inputs when you need the kick to come out.