Somberness, do you have the needed equipment to do the same imput for both players at the same time? Usually its done with 2 arcade sticks, in one of them you have a common button for p1 and p2, people have done that in the past to test imput lag on different pcbs and different tvs.
If you just do the move manually on both controllers with the same character on both sides you will never be sure about the reliability of the results because if theirs moves arent synchronized theirs hitboxes and mainly the hurtboxes (which we cant see) arent synchronized aswell.
And I will just quote the other guys and to suggest you to test it on versus mode, The trainning mode on this game is just full of malfunctioning scripts.
If you just do the move manually on both controllers with the same character on both sides you will never be sure about the reliability of the results because if theirs moves arent synchronized theirs hitboxes and mainly the hurtboxes (which we cant see) arent synchronized aswell.
And I will just quote the other guys and to suggest you to test it on versus mode, The trainning mode on this game is just full of malfunctioning scripts.