Pokemon is entirely owned by Nintendo, it's just that they don't entirely control their own ability to license it out, which is held by the Pokemon Company, a brand management skeleton
This definitely wouldn't be an official app, though. Just looking at it you see Metroid Prime Samus used for the background of the App, which Nintendo wouldn't use
Nintendo should crack down hard on these illegitimate apps. If people think they can get Nintendo games on smartphones, then it'll hurt DS/3DS
Monster Hunter: pissing me off since 2010.