This is sort of inspired by the weather here right now (103 F, according to our gauge that's in the shade).
In process: Emolga
On Deck: Slowpoke/Clefable, Jumpluff/Klinklang/Gulpin, Prinplup/Pignite, Reuniclus/Slowbro, Pinsir/Nosepass
The sun was high overhead, a blazing yellow spot that spread its bright rays everywhere. The air was dusty and hot, stifling to those not used to it. Ahead and behind them, there was a long gravel-strewn road, winding around this arid rocky landscape going somewhere. The bushes scattered about were thorny; the trees were tough, what few there were. Hills and mountains surrounded them, not the tallest ones they had seen, definitely not. With the drone of cicadas and flies filling the air, it already seemed like a long trip.
Long enough that the human of the pair had started feeling faint from the heat. A while back, they had stopped to let him recover. Gigalith had stayed still so that the boy, Black, could sit in his shadow, drinking water, ignoring the flies, and trying to get his strength back. But he'd insisted that they had to keep going; they had to be at a town somewhere along this road today. Black had said it was some distance to go, although the measurement didn't mean anything to Gigalith. It took him not moving and crouching down to get the message across that he'd carry Black the rest of the way, to make sure he didn't collapse.
That had been, what, an hour ago? Maybe that was right. Gigalith was pacing himself, pausing occasionally in the shadows of trees and boulders, puffing away flies that buzzed around his face. On his back, Black had found a place to settle himself in with an umbrella to keep the sun off him. He had napped for a little bit, but electronic sounds indicated he was trying to work with one of his devices. Gigalith was a dark blue, but he was able to regulate his temperature with the red crystals growing inside and outside him. With this, he tried to pull heat energy away from where Black was, to keep him cool. He had to store it by stuffing the heat into some of his lower crystals. If he got picked for battle later, he'd certainly have enough energy to blow away his opponents.
“Guh, should've flown there,” Black muttered. “I wonder where Zekrom has gotten off to.” He paused, during which Gigalith glanced up at the skies. The legendary black dragon should be obvious, but he wasn't in view currently. “Eh, I'm sure she'll show up if she gets worried. Still feels weird; I don't really want to command a Pokemon like that. Just doesn't seem right. Oh, you doing okay Gigalith? Hold up a moment and I'll get you some water too.”
Gigalith quickened his steps, keeping Black from sliding off until they were in the shade of a lone tree. Even it was looking hot and worn out from the heat wave. Black sat in front of him, holding a water bottle and cupping his hand under it to help Gigalith get a drink; these things weren't designed for a Pokemon like him to drink directly from. Normally, he didn't need a lot of water. But normally, his kind lived in caves, underground. He could withstand this bright heat better than a human, yes, but the water was a welcome refreshment. Black even offered him a couple of Lava Cookies as a treat, or maybe thanks for taking over the walking.
After that, Black stayed there in the shade a bit longer, quiet. His skin was pinker than usual, glossy with sweat. Even though he hadn't been walking, he still looked tired. The flies buzzed around him; a fat black one even landed on the boy's ear, but Black didn't react. Gigalith blew at it, getting it to fly away. Dumb little insects, they shouldn't be making this worse for his boy.
“We better keep going, get this over with,” he finally said, getting up to get back on Gigalith's back. The Pokemon waited patiently while he did so. Right in front of him, the large black fly flew around. But it was a little thing, just an annoyance.
When Black patted his back, Gigalith went back out into the sun to start walking along the gravel road again. They hadn't encountered any other humans; they were probably keeping indoors, in the cool. Most of the Pokemon were keeping out of the heat too, although the flies kept buzzing around him. Especially that big fat one. It flew right in front of his eyes at one point. Huffing in annoyance, Gigalith kept moving on.
The computer noises started back up, but it sounded like the Pokedex this time. “I've got to think of something to write about you in the Gigalith entry,” Black said. “It hasn't gotten covered yet.”
Bzzz bzzz bzzz. The fat fly stayed right near him, buzzing close to his ear holes and momentarily seeming louder than even the cicadas. Puffing it away, Gigalith figured that it was better the fly was bugging him rather than Black.
“Gigalith may seem rough, but it makes for a surprisingly gentle ride over bad terrain,” Black thought aloud. “Nah, it might just be you. A different natured Gigalith might not be willing to carry someone.”
It flew by his eyes again. What was with these flies? Gigalith didn't have anything that would be interesting to the bugs. And really, they weren't even Bugs like the Whirlipedes and Sewaddles. The flies were insects, below Pokemon. They were prey, that is, if one were a bug-eating Pokemon. Gigalith preferred minerals, maybe even this gravel he was walking over. So he didn't need to bother paying attention to the fly. Gigalith quickened his pace, hoping to outwalk the fly.
Black was still talking to himself. “Their crystal growths become more prominent and... no, that's dull. Man, some of these are easy, and other ones I have no idea what to suggest. And Cheren seems to come up with all the cool ones. Maybe I should ask some others about behaviors or quirks... but I can't recall many trainers with a Gigalith.”
At that point, the fat black fly landed on Gigalith, right between his eyes. He could see it there, rubbing its forelegs together and brushing its head like it didn't have a care. He didn't mind carrying Black; he was as powerful as he was thanks to Black, and the boy had always made him feel special. But he wasn't going to carry some deadbeat annoying fly as well. He wasn't even going to let it bug him anymore. Gigalith puffed at it until it flew off, but he gathered energy inside his most powerful crystal. After all, he had plenty of heat energy to drain from himself and the air around him.
“The crystals seem to be connected to their power source...” Black paused. “Gigalith? What are you doing?”
He slowed, watching the fly and continuing to gather energy, condensing it further into fewer crystals, then transferring that into an attack. Once the fly was in a good spot, Gigalith opened up his mouth and fired a concentrated beam at it. The attack flew on, straight into the earth of a mountain a hundred yards away (if his guess at human measurements was right). With all the heat energy that he'd stored up trying to keep Black cool, there was soon a massive hole straight through the face of the mountain.
For a moment, everything was still. Then the cracking began, enormous fractures of earth and rock made by the sudden lack of support through the center. The mountain then collapsed, sending up a huge cloud of dust that rolled over them like a wave. The noise from it was tremendous, the loudest rock slide Gigalith had ever witnessed. When the air cleared, the small mountain had become a large hill of rubble.
There were also the non-existent remains of one very dead fly.
Gigalith Black entry: Compressing the energy from its internal core lets it fire off an attack capable of blowing away a mountain.
(Not that I know this from personal experience.)