Direct quotation from Pokemon
Dungeon: Explorers of Sky – Special Episode 5: In the Future of
Darkness:

“Dusknoir:
Grovyle... You... You... Why do you fight so hard like this? Before,
you... you said it was for the future... You said... You fight... For
a new life... But if you do, you'll disappear. Your existence... will
end. For me, that sort of thing – I cannot bear the idea. To
make myself disappear... I will not allow it. With all that said, why
do you fight so hard for such a goal?

Grovyle:
Dusknoir, I understand that you don't want to disappear.
But me... This is what I think: Even if we were to disappear... Even
if I were to disappear... I wouldn't truly disappear.

Dusknoir:
What [do you mean]?

Grovyle:
Everything ends eventually. Even if history is not
changed... Even if the world of darkness continues in its current
state... Eventually the day will come when I'm not here anymore.
Since that's the case, the timing of it doesn't matter. The
important thing is not how long you live... It's what you accomplish
with your life.

{Dusknoir thinks over what Grovyle had said.}

Grovyle: While I live, I want to shine. I want to prove that I
exist. If I could do something really important... That would
definitely carry on into the future. No... Not just into the future.
In [main player's] and [partner's] future too... My spirit [will]
become part of them, I believe. In them, my spirit is alive. And that
spirit could be passed along to others. And so, if I were to
disappear... I think all that I have accomplished will go on. That
is... That would mean... that it's living, right?

{Dusknoir continues to think over Grovyle's words. He starts
to gain hope and they continue on their journey.}”

I have always wondered where I had gotten the inspiration to write
Mirrored Destinies. At first, I thought it was mainly inspired
by Doraemon and The Time Traveler's Wife. And for a
long time, I had believed that. As I re-watch a popular walkthrough
of this special part in the game, I had finally realized where this
base came from.

At the time in which I played this specific part of the game, I was
about eleven. This is before I ever thought that I would write an
actual novel (for I was a bit obsessed with fanfiction), and I didn't
even think I was the least competent in literature. Right after I
turned thirteen, I had gotten the idea for a novel about two pitiful
girls who were “mirrored images,” forced to time travel
through mirrors to avenge someone and to gain freedom from
everlasting cruelty (this was my first, unedited plot bunny. As of
May 2012, the plot and characters have changed drastically). And of
course, I was no longer obsessed with Pokemon games or fanfiction. In
fact, I even ignored the existence of my game consoles for a long
time. And for a long period of time, I kept writing and erased most
of my pleasures from when I was younger from my mind.

A few days ago, I realized I had a picture of “Primal Dialga”
on my iPod device. I then remembered the existence of the game, and
the old obsession I had with Dialga's theme. However, I had
completely forgotten its tune. I tried to sing the notes in my head,
but I couldn't remember a single pitch. I don't remember the rhythm;
I didn't remember anything. So, determined to remember such a theme
that I used to love, I searched up my favorite piano arrangement on
Youtube. While listening to it, I remembered my absolute favorite
part about the game – Special Episode 5: In the Future of
Darkness! I did not remember any details about that specific
mission. I did remember, however, a sad bond between two enemies who
then emerges as friends because of hardships, wisdom, and melancholy.
And also, changing the future. Wanting a good trip into
nostalgia-land, I searched for a famous Youtuber's walkthrough. I was
delighted when I found it and began to watch.

As I got to about part 4 of the playthrough, the quotes above
occurred to me. I don't remember being so inspired about this –
I certainly did not mean to recall it. And when I first wrote a quick
plot bunny and character development, the game didn't pop up in my
head at all. Is this a mere coincidence, or have I unconsciously kept
the information in a part of my brain without knowing? Either way, I
believe this game's messages and pessimism has played a notable part
in building who I am today – the slightly nihilistic cynic who
criticizes everything and believes that existence which stokes a
revolution is only meaningful thing that remains in the end.

I am very thankful of this game. I don't think I saw the game deep
enough when I played it at such a young age. To be honest, I would
love to whip out my DS console and play it now, but I am far too
timeless and I don't think my skills are as professional as when I
used to game rapidly everyday.