Good luck getting any pirated build taken down, but one thing I've tried to do is make sure the app or game has links to the proper download site built in, so no one can claim they didn't know.
I got so irritated at my updates on Google Play showing up immediately on Aptoide (the only thing more irritating was people telling me I should be happy about it) that I put the following text at the top of my app description, and pirates generally don't bother removing it when they copy the whole app page (Aptoide has a "feature" for copying google play pages, but omitting the original developer identification), so I do get some mild amusement at seeing it when I google for my game.
*** The paid version of this app is infrequently updated, due to the users who immediately distribute it to pirate sites like Aptoide every time I release an update. If you don't want to pay for it, please download the free HyperBowl app on Google Play. ***