Hey there.
If you're not able to interact with your iPad Pro because you keep seeing a flickering charging/battery screen you'll want to make sure you're using the latest version of iOS. You can check if you're using the latest version of iOS or not by visiting this link: Update the iOS on your iPhone, iPad, or iPod touch - Apple Support. If you're still having issues you may want to restore your iPad to factory settings, which you can find the support article for here: Restore your iPhone, iPad, or iPod to factory settings - Apple Support. And if you're still having issues you may want to contact Apple Support, and or, schedule a Genius Bar appointment: https://www.apple.com/support.
Hopefully your charging issues can get resolved.
🙂