Pick your favorite legendary and state why it is cooler/better than all other legendaries. Also, find a downfall to the legend mentioned in the post above your's. (No hard feelings intended) You may repeat a legend already said, as long as you have a different reason.
Mew: Its a cute little bundle of joy and it DESTROYS IN BATTLE!!!!!!!! Also, it can learn all TMs and HMs. This is the enemies reaction when they see it. First, they laugh. Then, they are scared. Then, they are no more.(visual demonstration included)