Oh I got it!
I just had to make the DashAttack subaction to change to an unused action
In the unused action I put:
Change Action=10, requirement=Animation End
Additional requirement= On Ground
Change Action=E, requirement=Animation End
Additional requirement= In Air
Set Air/Ground=Undefined(10)
8000100: 0-5,
Change SubAction=(Unused Subaction with the animation, offensive collisions and momentum and stuff.)
But last time I did this, the game froze. I thought it was because of the action I edited. So I spent hours after that trying to figure out different ways of doing this. But then when I did something not relating to editing actions that froze the game, I realised that editing the actions isnt what was freezing it. I guess when I save something on Smash Attacks, I also have to cancel out the program. What a waste of hours

.