After lining up the first moonsault, I just mash A until it hits, then quickly QCF until it hits again, then repeat. I'm pretty noob, but input buffer is pretty friendly on it
I couldn't get the dash spring OMC air dash though, challenge 25. I just can't dash/instant airdash reliably with stick or with wasd on keyboard I might need a hitbox.
vs zoning characters got a bit easier once I learned how EX Dash Spring went through projectiles, pretty amazing.