Well it was just a matter of time, I don't use the app store so I don't know if this kind of applicatons are avalible there.
If you're an Android gamer, chances are you've heard of Nesoid, Snesoid, Gensoid, N64oid, Ataroid, Gearoid and Gameboid: they're all video game console emulators developed by yongzh, and many ranked among the most popular paid apps on the Android Market. This week, they've got something else in common, too -- they've all been abruptly removed. Following a complaint from Sega, two emulators were nixed late last month, but we're hearing that Google has since revoked yongzh's developer privileges, just like PSX4Droid comrade-in-arms ZodTTD. We're currently reaching out to both yongzh and Google for comment, and hope to hear back soon, but it's looking like a bleak week for the emulation community.
http://www.engadget.com/2011/05/29/android-markets-most-popular-emulators-disappear-without-a-trac/