Because Game Freak decided to prevent people from transferring it to Black 2 and White 2. AGAIN.
I understand not transferring it to Black and White, mostly because a team separate from the team working on Heart Gold and Soul Silver worked on Black and White, but you would think the creators would catch on by now.
C'mon Game Freak, I just want to have an awesome looking Pichu! Why can't you do that? :(
/rant --- Weapon of Choice: The Scepter. My special bond is of the Hermit Arcana. Magic! http://www.youtube.com/watch?v=84WpcmJ28Yg
I'm not sure why they even made that thing. I was certain that it was a "preview" of Gen 5 including Pokemon with various visual differences. But then that didn't happen, and the Pichu had even less of a point than ever. --- If you actively hate Justin Bieber... then you don't know what "intended audience" means. Hate Twilight instead, it's far worse.