This was a ultra rare back to back shiny, right after I got out from the professor's lab I got in to the grass and first encounter was this shiny rattata that I could not catch due to being to early in the game and not having pokeballs! An uncatchable Rattata!!! I had to knock it out to proceed! T_T RIP. (Back to back odds are 1 - 67,108,864) LOL!!!