>>39244874First couple of decades would suck as it'd mostly be limited to normal and fire based abilities so as Ninetails I'd only be able to manipulate things with my mouth and tails and shuffle things with my paws. I'd be just living a generic life, hell I might even allow myself to be caught and travel with a trainer.
By two centuries old my psychic abilities would be strong enough to create illusions that make a Zoroark jealous as they appear to have substance but still can be seen through by an observant human. I'd also be able to make myself invisible and hide my presence from psychic pokemon. Still wouldn't know telekinesis. The anime shows Ninetails illusionary avatar manipulating real objects but that could have Ninetails herself doing it with her tails or mouth while invisible.
At that point I wouldn't travel with a trainer anymore, even if I liked the company and purpose, I know I'd have trouble remaining subservient at that point even to an experienced mid-age trainer.
By about 5 centuries old I'd be getting abilities like teleport, telekinesis, but also some scary stuff like morph other, transfer soul, sense aura, and morph self, and will-o-wisps that acts independently far away from the body
While I probably could live like a human again at that point I'd be worried about going evil with that much power since I'm not a pokemon I'm human. The Ninetails in Red Rescue team that had all these abilities was also clearly starting to go insane due to its long life, sour experiences, the fact everyone fears here, and that she'll centuries more.
So I'd be thinking that would be my bow out point. I might have some fun for awhile maybe being a super hero, or going all traditional and hanging out at shrines testing trainers and visitors. Few years of that and it'd be time to go.
Last thing thing I'd do is wipe much of my own memory, both to make adapting to being a human again tolerable, and because giving up that much power would be HARD.
