I thought this would be something ironic. You know, maybe it would show Pikachu commanding Ash to do something. It was just the way he was pointing in the thumbnail. I guess it still could...be? It was weird to see him fat. This is still a decent picture.
It's kind of funny to see him so fat. I guess it's just a random idea. The author's comments (or comment) says all. He looks fairly creepy. That must have been somewhat intentional.