To skip animation/startup sequences, first install a volume rocker switch where the unused tournament button cutout is.
Here's the link:
www.pinballlife.com/mm5/merchant.mvc?Screen=PROD&Product_Code=PBL-100-0062-00
Then, when you hit sparky multiball, just touch the switch and you'll cancel the animation/startup.
Simple and effective, plus, you now have a volume adjustment on the outside of your game.