Was putting it off for last because of how everyone was talking, though it was going to be a nightmare. All you have to do is hold diagonal and hit LB when they rush you and stop. It only takes a few matches to get the timing down perfectly and then they can barely touch you.
So yeah I don't know if we've figured out what the actual requirements were, but I played each mode once without continuing and I got them both first try.
Now time to ignore the fact that Lisa has one too....
keep some distance between you and your opponent (just enough for you to hit the moonsault) and wait till they try and do something, then do it. if you just do it all the time they'll either block it or counter it.
it takes a little practice, but once you get it down, it's a breeze.
Leifang. Bottom left. I tried the Tina drop and got brutally destroyed everytime. This method wa practically fool proof. The only skill you need is being able to get up and away if you blow the attack and they get through.