"How about a compromise?" asked Jon, thoughtfully, "Wish I had your Jon's memories but otherwise would be unchanged and would still have my old memories and personality."
"I don't know..." Replied Biff, hugging his knees to his chest.
"Please," said Jon, "Even if I didn't need to know about us, I still need to know about everything else that's changed - you can't fill me in on everything, and where would we start anyway?"
Biff chewed his lip, "okay I guess." Clutching the stone he said "I wish that Jon would have all the memories of the Jon of this reality but would keep his old ones; he'd be unchanged physically and mentally and would just gain the new memories."
"Whoah," said Jon as new memories flooded his mind. He looked up at Biff and smiled.