I can't tell what the heck you're saying, you really need to use commas to separate your ideas. Did you already have a 3DS that you've been playing Pokemon on, and got a new 3DS with 4.5 on it? Did you sell the old 3DS to get the 4.5 3DS, or do you still have both? All of these can be guessed at with your ambiguous post. At ant rate, NO, you will NEVER be able to play a 4.5 Pokemon save on a newly updated 3DS or vice-versa. You'll just have to get a second 3DS that you keep for legit games and whatnot. Plenty of people usually get 2 consoles, one legit and one hacked, after a hack is released so that they can preserve their hackable system while still enjoying games they otherwise couldn't play on a hacked console. I have 2 3DS XL's just for that purpose, and it is GLORIOUS.