So I just went to the Power Plant and fixed it and decided to dick around in the desert a bit. I went straight down to the south and came across some stairs, and that fucking hobo guy was there.

I tried to stay away from spoilers, but...he said something about a "Flower Pokemon. The Flower Pokemon that was given eternal life"

What the fuck is he talking about? Is this relevant to the plot? Is it Shaymin? Perhaps the "Pixie" of this gen?