Ugh, why would anyone want to do this anyway? "Hey, I'm gonna send a virus to everyone's computer even though I get no money for it and I'll eventually get caught and sent to jail anyway! Wow, what an amazing idea!" Unless some guy's paying him to do this.
Anyway, Mario is being used for the forces of evil; he's gone from hero to two-timing, double-crossing crook. He even makes the little children believe he's still the good guy by disguising himself as a game, then he strikes when they least expect. Don't you care about the children Mario? You disgust me.