I'm not even sure which move you mean, though. Do you mean that "taunt" after 2A+K, A, A, A, A etc.? Are you sure it's possible to that move instantly after 2A+K? I've only seen it after at least one spin.
Pretty sure Talim's WNS-K's just frame is unlisted. Allows her to jump forward with another WNS even on block or whiff. She can fly in a sense, but the timing is pretty brutal, especially on whiff (no screen pause in the frame you want).
For Yoshi, 4aA+B, (2) will turn him around while the opponent flies over his head, making more combos possible. Also, he's able to move just a little bit during the 4aA+B spin, similar to Dragonfly stance.