That's what its name means

Apparently Pica is an eating disorder. All this time I thought Pikachu was saying his name, instead it's a cry for help. He's saying his disease and it's symptoms the best any pokemon could in broken English.

Pica... Pica chew.

http://www.webmd.com/a-to-z-guides/pica-11089

This is my submission for bad-joke-of-the-blog.