STFU KIRAN U NO NUTHING!!!!!111
If you mind it being choppy, which doesn't bother me at all. You should try inbetweening, just make a new frame inbetween the keyframes. Set the onion skin to show the previous and the next frame. Then draw everything inbetween the two frames. That way it won't be choppy, just 2x slower. Although, I prefer choppy. It adds to the anticipation. Or y'know, animate at 12 FPS.