Biking throught Valor Lakefront was worth it, because I found myself an altered Graveler. It wasn't like any of the other Gravelers in the wild, because it's color was a tinted orange. You don't find many Pokemon like that, because odds of finding one are 1 in 8,192 battles. Even after 8,191 battles, the odds are still the same. The trick is just to be patient.