Can you be more specific?
Do you want it to be the same number of frames (how long the animation takes to play), or to look the same (in terms of the actual pictures shown during the animation) ?
So instead of the player throwing the pokeball out, you want the pokeball to instead be on the ground, and open up while the player goes to the left on the screen.
Got it.
That will take some RGSS coding, but it shouldn't be too horrible.