Mini-post: You look different, Pikachu!

One of these Pokemon isn't like the others, one of these Pokemon is unbelievably lulzy and almost made me spend 1200yen.

Can you tell who doesn't belong???

ANSWER:

IT'S DITTO! A POKEMON I ACTUALLY KNOW FROM MY CHILDHOOD!!!

I almost bought it, but I didn't wanna carry him around. I wonder how many kids in that store understood what was going on with this one...