You're trying to outdo me with pokemon, hmmm... Very well.
I find and befriend mew, who, as the original pokemon, can do anything any other pokemon can do. Mew restores my memory by transforming into Dialga and moving me through time, just in time to stop Uxie from wiping my memory (This time line then becomes dominant, meaning I replace te present me, but keep all the memories). I then find Registeel, my natural ally. Mew transforms into Palkia and teleports us inside the time line, without crossing it. I kill you and take the hill, subjugating Dialga to my will. Mew departs, but promises to help, and Registeel remains to guard the hill. My hill.