Where does this art come from?

[Maxim Posthumus]

When I was looking in pochi's site, I noticed something which caught my interest.

It's this art.

It shows several berries, looks official (I would say, Dungeon-ish). But I have no single clue where does this art come from?

Did anyone see it in the net? Can I have a link, if possible?

And finally - is it a real art or a fanart smartly imitating official style?

 

[Kasumi]

Looks something fan made to me.

 

[ShinyFlareon]

Yup. Probably good combinations for certain types of Poffins.