Again, please do not give out info if you are not sure what you are talking about. Not only do you give wrong info, but it doesn't make you look too good either.
You cannot (without cheating anyway) restart your game with the same ID number. That is next to impossible. Any time you trade Pokes from one game to the next, those Pokes are treated as traded Pokes and they must abide by the limitations that GF thankfully put into place. Why you would want to start the game with high level Pokes is beyond me. A Lv50 Poke battling a Lv4 Poke serves no purpose and you don't get enough Exp points to make it even worth your while. It is better to play by the rules and become a better skilled trainer. In the end though, it is to each their own. If you are compelled to cheat, that is your choice.