I recently installed "Pokemon Go" game in my Redmi Note 4G. The game is working fine. But I noticed something peculiar in my booting screen. It shows up just after the MIUI logo. I took a photo and did a little research and came to know that the logo is of Cubeon, a Pokemon character. I don't know why this is happening. Is there any security issues? How did the app get access to my boot menu?
It's not from Niantic, it is the silhouette of the MIUI character head.
It's possible comes with a MIUI theme what you downloaded and applied.
That appears when you install custom themes like in iOS 9 theme (afterglow or retouched I'm not sure), as the theme engine includes options for a theme to change the boot screen.