I thought not. Its not a story Game Freak would tell you. Its a Squaresoft Legend. Darth Sephiroth was a dark lord of Final Fantasy VII, so powerful and so wise he could use the mako energy to influence the midichlorians to create Jenova...He had such a knowledge of the dark side, he could even keep the ones he cared about from dying.

The Squaresoft side of the Force is a pathway to many games some consider to be unnatural.

He became so powerful...The only thing he was afraid of was losing his power, which eventually of course, he did. Unfortunately, he taught the protagonist everything he knew, then the protagonist killed him in his sleep. Ironic. He could save others from death, but not himself.