It's just someone making the strat guide. Nothing to do with Nintendo.

Uhh don't think there's a problem buddy.

they've been doing these for all game releases, not just nintendo, the apps on itunes and android market are made by normal people not always officials.

This is not an official app, however given Iwata's statements about working with other platforms during the recent shareholder's meeting, I expect to see more apps from Nintendo, and one's offering more functionality than that pokemon one as well.

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

ive seen those for awhile their not from nintendo and like Khan said Nintendo should crack down.

If you read through Iwata's points from the latest shareholder meeting, it looks like he's talking about some of kind of connectivity between Nintendo devices and other lifestyle consumer products, such as networked TVs and maybe tablets and cell-phones. This would be a good change of direction for the company as it would allow for expansion into other hardware markets without sacrificing their own hardware as a key component in the experience. Personally, if they follow through on this, I expect to see more interesting applications that use such connectivity than just simple guides and walkthroughs.