Go back to the tile you got it. Get loads. Go to the guy who tells what it pokeblocks it likes. (He's in mosdeep) If it likes the pokeblock that raises beauty. Go feed it. I think the rash nature likes them. A few others though.
You'll want to blend plenty of Pamtre berries for the best effect. You need to say "CHALLENGE CONTEST" to the Berry Master's wife. That way you'll get a bunch of Indigo blocks.
Also, the natures that like the Dry flavor are Mild, Modest, Rash, and Quiet.