I have to agree with Dyl here :) Pichu was introduced as a baby pokémon and still can't be caught in the wild. Thus, Raichu's stage should be considered as somewhere in between Luxio's and Luxray's. At least that's what I think but I don't know if official sources say anything on the matter.
Also, the reason we are "obsessed" with the "rat" is because of this thread. We like Pikachu more than we hate him ^^