thats not a Pikachu, the tail is wrong, thats a Richu, Pikachus evolved form. and if u think about it, Pikachu has been seen to eat hamburgers in the animated show, and just about anything else put in front of him,

I've never been the biggest follower of Pokemon... All I know is that Pikachu is based on a mouse. So I figured Pikachu ate mouse stuff. I don't really watch the cartoon either. I've only seen a few bits of various episodes..

As far as i know hes the artist and if ya dont want to see that, well the easy step is : Dont Look?

It's called "vore" and is a fetish, that is why his drawings would consist of such things :3 *cues the "the more you know" music*

Diet
Mice are omnivores meaning they eat both plant material and meat. The base of a mouse's diet should be rodent blocks purchased from the pet store. Fruits, veggies, grains and oats should also be served on a daily basis. Although mice love junk food such as potato chips and baked goods these foods are not nutritionally sound and will lead to obesity. Because they are omnivorous, mice enjoy small amounts of cooked, low-fat meats. Small amounts of boiled egg can also be quite the treat for our tiny rodent pals. http://www.seattlehumane.org/services/critter-advice/mice-rats