More difficult or not, it's unfair to those who guessed a Pokemon with a similar appearance. And if you think the rest is too easy, pick another Pokemon. Easy as that. Heck, you can make something difficult without choosing a spot that could be ambiguous. Take Arcanine, for example. I had to go through at least ten Pokemon (probably) before getting it.
I still strongly believe something should be done about it. Disregard my "I don't care" in the previous post; your reason for choosing such a place just isn't good enough, imo :/ And your being in Arizona doesn't matter either; it's not like you're obligated to make a new one each week; you have a life, who cares if others are complaining about you getting a new one up and giving the answer in time.