Do not expect Wii U emulation on Android for another 3-5 years. The hardware is not there yet.
The Google Play Store has strict policies. While it does host legitimate emulators (like PPSSPP, Dolphin, or AetherSX2), it does host Cemu. Scammers use the phrase "Play Store" to lend legitimacy to their fake downloads. They may even create fake store listings using stolen screenshots from the PC version. cemu emulator play store repack