This idea has been done before. Quiet a few times, from what I've seen. But to be honest, all of the ones I've seen look so similar in writing style and in ideas. I hope that I can deviate from that some. Plus, I wanted to try writing a story first person style.
Alright then, here's my attempt at a "what happened while you and Grovyle where in the future" fic.
Disclaimer: Any OC's belong to me, although Pokemon itself is not mine and I make no money from the writing of this fanfiction.
Hello young one, who walks this dark path with me. I know that this way of life is a long, hard one and that we have little time or room for luxuries, but allow this old woman to indulge you in one anyways. Allow me a moment to tell you the story of how I met two of the most remarkable people in this dreary world. They are both grown now, of course, but I knew them both when they were very small. Their story is certainly one you will want to hear, but alas, I cannot tell you its ending.
I suppose that makes you want to listen to the ramblings of an old woman less. Who, after all, wants to hear a story with no end? But my dear, just trust me, you will not be sorry you heard the tale of my children and I think that once you have heard, you will be able to deduce their fate yourself.
Now come, sit by our fire and relax! This Absol here may look scary, but trust me, he's been my faithful husband for years, and I couldn't imagine him hurting a fly. At least, not without reason.
Oh, and the Ninetails? Well, trust me, she won't hurt you either. She might throttle me for making her listen to this story once again, but that's my problem, not yours!
Anyways, this Abosl is Omen, my loving husband; this Ninetails is Feunard, my comrade in arms; and I am Minerva, the lovely old Umbreon.
Now, take a seat, take a seat, this story is a long one, and it starts with a dream. . .