Read: “except on certain pads”
And walking 720 is a programming error as, like I said, the game was designed with sticks, so they did not take into consideration the ability to do a walking 720 with a pad, or I suppose did not care enough to take it out. I’ll concede that it is an advantage with the very few characters that have worthwhile 720 ultras, but it’s not game breaking.
EDIT: Retract this, research proved us both wrong. Walking 720 is executable on stick.