The Underground Pokémon Diamond, Pearl, & Platinum Versions
they played this at Nintendo World in NYC once and I almost fell to the floor remembering how many hours I spent playing...
Another favorite from DPP
Favorite feature in the Sinnoh games hands down and such good music too aHH
Did you know this is a remix of the Hoenn desert route, aka Route 111? Surprised me when I first learned that!