you should need to find the statedef where gogeta teleports (to do these put winmugen in debug mode (ctrl+d), in the left low corner, you will see something that says stateno, thats the statedef that you need to find, then open the cns (if you have fighter factory, open the char), search for the staedef and add these
[State 0, Pause]
type = Pause
trigger1 = ;when is it going to activate , use animelem = x (x should be a number)
time = 1 ; how much time is it going to be active
movetime = 1 ; if you want to move freely make it the same as time
There are more values that you can add to the code, I just put the ones that are necesary.
If you need more info, just let me know