Air dash for crossover I guess he means, since it's what he wrote... Jump over a Zangief by air dashing and get him from behind in the middle of his attack.
I use air-dashing for attack more than defense, for which I can roll anyway. *Same as LadyKiki and Messatsu.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.