This chapter was pretty interesting. Seeing things from Gary's point of view was quite entertaining. While Eli is a straight-forward person, Gary seems easy-going with a touch of snark thrown in. I'm guessing you'll be switching POVs every now and then.
You know that reminds of someone from the anime...Tobias.And then came Ariel Day. About fifty years ago, a rogue trainer had captured the storm spirits of the land –a forbidden and illegal act. He proceeded to crush the local leaders.
Wow, so the Pokemon Trainer profession is dying art in your story. It makes me wonder, why training has lost popularity.Tangent aside, there was no reason to train anymore. Strength was unneeded, advancement was nearly impossible, and training opportunities were scarce. It was actually kind of depressing, considering that Gramps had been one of the best trainers’ alive back in his day. It supposedly it ran in the blood. Yeah, so nice to know that even my blood is out to ruin my life.
When I read the last few lines of the chapter I thought "I remember reading this before. Wasn't this from his first fic?". I was right. I'm looking forward to how you incorporate the plot from Flames of Dawn into System of Variables.
Overall this chapter was good. Your grammar and spelling is good, although I'm not a grammar specialist so don't count on me finding errors that aren't glaringly obvious.