And they say you have problems. :3
You can do it in Tekken 6 and 7
Go to Practice mode/Versus mode if you have 2 controllers
Pick King
Pick your favorite girl
1 3
Get to the front of her legs then DB 1 3 (Down back and 1 3) EX. Playstation: Square (1) and X (3)
Xbox: X (1) and A (3)
Wii U: Y (1) and B (3)
That Miguel part is from here