Possible, but I'm really doubting it; I think the Notched-ear Pichu really won't be available in GSC, with that being why their giving out the Pikachu-Colored Pichu for pre-ordering the 12th movie tickets. I believe that something like the 12th Movie site or something described NEP's ear as simply being a cowlick. Because of stuff like that, I believe that it was just something to make the NEP stand out in the movie from normal Pichu, and won't actually be something that's implemented into the games. I suppose I could be wrong though.Just take this as rumour for now, but the game might feature different Pokemon appearances based on parents. Sort of like this Pichu from one of the movies I think it is.