[Android Q&A, Help & Troubleshooting] simonepsp:
This is my logcat, maybe it could be useful...

04-01 23:53:11.701 12745-12751/? I/art: Debugger is no longer active
04-01 23:53:11.728 12745-12745/? I/Xposed: Miitomo Security bypasser: Entering Miitomo... Ready... Set... GO!
04-01 23:53:11.776 12745-12745/? V/NUANCE: JNI_OnLoad
04-01 23:53:11.779 12745-12745/? I/art: Thread[1,tid=12745,Native,Thread*=0xb4f86d30,peer=0x74b9f510,"main"] recursive attempt to load library "/data/app/com.nintendo.zaaa-1/lib/arm/libNuanceVocalizer.so"
04-01 23:53:12.058 12745-12745/? I/Xposed: Miitomo Security bypasser: All you logcat output are belong to us! (Trying to catch u.cS(), logcat output should be available now!)
04-01 23:53:12.058 12745-12745/? I/Xposed: Miitomo Security bypasser: Nintendo, I'm afraid I can't let you do that... (Hooked SecureController.L())
04-01 23:53:12.058 12745-12745/? I/Xposed: Miitomo Security bypasser: Nintendo is trying to stop us, but I won't let it happen! (Hooked SecureController.ZD())
04-01 23:53:12.058 12745-12745/? I/Xposed: Miitomo Security bypasser: It's debug time! (Set BuildConfig.DEBUG to true)
04-01 23:53:12.059 12745-12745/? D/MIITOMO_J: enter FacebookSdkController.init
04-01 23:53:12.080 12745-12768/? W/System: ClassLoader referenced unknown path: /system/framework/tcmclient.jar
04-01 23:53:12.086 12745-12745/? D/MIITOMO_J: exit FacebookSdkController.init
04-01 23:53:12.089 12745-12745/? D/MIITOMO_J: enter TwitterSdkController.init
04-01 23:53:12.142 12745-12745/? D/MIITOMO_J: exit TwitterSdkController.init
04-01 23:53:12.142 12745-12745/? D/MIITOMO_bl: UtilGcmIntent::checkExtras return false.
04-01 23:53:12.143 12745-12745/? D/MIITOMO_NAWebViewAccessor: NAWebViewAccessor in
04-01 23:53:12.143 12745-12745/? D/MIITOMO_NAWebViewAccessor: NAWebViewAccessor done
04-01 23:53:12.150 12745-12745/? D/MIITOMO_NAWebViewAccessor: onResume call.
04-01 23:53:12.150 12745-12745/? D/MIITOMO_NAWebViewAccessor: onResume done.
04-01 23:53:12.156 12745-12772/? D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
04-01 23:53:12.175 12745-12772/? I/Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: EGL 1.4 QUALCOMM build: Nondeterministic_AU_msm8974_LA.BF.1.1.3_RB1__release_AU (Ia6c73e7530)
OpenGL ES Shader Compiler Version: E031.29.00.00
Build Date: 12/04/15 Fri
Local Branch: mybranch17080070
Remote Branch: quic/LA.BF.1.1.3_rb1.5
Local Patches: NONE
Reconstruct Branch: NOTHING
04-01 23:53:12.176 12745-12772/? I/OpenGLRenderer: Initialized EGL, version 1.4
04-01 23:53:12.318 12745-12767/? D/MIITOMO_J: src size:703
04-01 23:53:12.318 12745-12767/? D/MIITOMO_J: key size:32
04-01 23:53:12.318 12745-12767/? D/MIITOMO_J: iv size:16
04-01 23:53:12.319 12745-12767/? D/MIITOMO_J: decrypted size:703
04-01 23:53:12.320 12745-12767/? A/Adjust: PRODUCTION: Adjust is running in Production mode. Use this setting only for the build that you want to publish. Set the environment to `sandbox` if you want to test your app!
04-01 23:53:12.420 12745-12767/? W/libOpenSLES: class AudioPlayer interface 3 requested but unavailable MPH=36
04-01 23:53:12.635 12745-12767/? I/Xposed: Miitomo Security bypasser: Mii a emulator? Nope! (Hooked SecureController.checkEmulator())
04-01 23:53:12.993 12745-12767/com.nintendo.zaaa D/MIITOMO_UtilVersion: UtilVersion::getVersionName : {"valid":true,"name":"1.1.2"}
04-01 23:53:12.997 12745-12767/com.nintendo.zaaa D/MIITOMO_J: src size:135
04-01 23:53:12.997 12745-12767/com.nintendo.zaaa D/MIITOMO_J: key size:32
04-01 23:53:12.998 12745-12767/com.nintendo.zaaa D/MIITOMO_J: iv size:16
04-01 23:53:12.998 12745-12767/com.nintendo.zaaa D/MIITOMO_J: decrypted size:135
04-01 23:53:13.038 12745-12767/com.nintendo.zaaa D/MIITOMO_J: src size:703
04-01 23:53:13.038 12745-12767/com.nintendo.zaaa D/MIITOMO_J: key size:32
04-01 23:53:13.038 12745-12767/com.nintendo.zaaa D/MIITOMO_J: iv size:16
04-01 23:53:13.038 12745-12767/com.nintendo.zaaa D/MIITOMO_J: decrypted size:703
04-01 23:53:17.329 12745-12793/com.nintendo.zaaa W/InstanceID/Rpc: Failed to resolve REGISTER intent, falling back

it just loops loading screen :(