Hello speedrunners of Spartan X2

First things first, i watch TAS of Spartan X2 and saw, that Uppercut using with jump i think, can humans may do this too, and here it is, my attemps of using this with inputs

In theory that is 1 frame( as in Battletoads with Dash jump) So, you press down, than immideately press Up,Forward + Punch Using Emulator: Mesen 0.9.9, Gamepad: Sony Dualsense (If its important) Nobody discuss it, so i made this thread I know that there is not a lot of runners, but i hope it was this helpful to you and maybe it will help to improve, have a great day!