Also known as "Pimpkachu"
The facial expression of this man simultaneously dressed as a pimp and Pikachu says it all, until you notice the woman on the left of the photograph. Oh, but just wait -- if you go look at the full image, you'll then see that he's got a sparkling Poké Ball cane.
Classy, original, and even a tad bit subtle, all things considered. I respect the hell out of people who can perfectly capture the essence of a fictional character through hand-made costumes, but this is the kind of creativity I particularly love to see from the cosplay community.