You awaken once more with a start, your vision no longer consumed by whiteness or blackness, and find yourself lying down on a patch of soft soil, the warmth of a summer morning's sun bearing down upon you. You're sore from head to toe. The air smells of a mix of assorted earthen scents, your own sweat, and just a faint hint of trash. Wherever you are, you seem to be outside, definitely not the safe confines of your own bedroom. Getting to your feet, you examine your surroundings further.
You appear to be in a dirt clearing surrounded by recently-cut blades of grass nearly as tall as you are. Clad only in your underwear and without a tool in sight, you are ill-equipped to fend for yourself in this foreign locale. Notably, you lack shoes. Looking more closely at your surroundings, it dawns on you that you are standing at the base of a truly enormous house, right in the shadow of a trash can the size of a building. As impossible as it is to fathom, you've been shrunk!
Your heart pounds as you assess the situation. A handful of Pokemon are fully capable of minimizing themselves and there have been stories of human shrinking. You know it not to be impossible, but why you? You briefly entertain the possibility that this may be a dream before ruling that out. This is reality, and you'll need to cope with it.
As you contemplate your situation, you notice a nearby flower, one roughly the size of your body. You find yourself instinctively drawn to it, and notice a nectar clinging to its bud. Driven by unfamiliar instincts, you begin to suck nectar off of the plant, and you feel a wave of rejuvenation wash through your body. Is this how you're going to feed yourself from now on? Feasting off of nectar like some lowly insect?
Your feasting is interrupted by a sudden clatter and a growl. Off in the corner of your vision, you catch a shocking sight. A lone Rattata is standing on its hind legs, the creature easily four times your height, the huge rat pokemon's attention turned towards a gap between the nearby metal trashcan's lid and the can itself. The creature bears buck teeth bigger than your chest is deep, a rump as wide as you are tall, and a belly no doubt capable of housing you. As hard as it is to imagine yourself being overpowered by a lowly Rat pokemon, you find yourself backing away in dread.
Rattata are omnivores.
The Rattata's ears twitch as it detects your presence. Its attention darts between the novel creature in the dirt and the trash can it had set out to raid. As the Rattata turns to face you and gets on all fours, it quickly becomes clear that the creature has chosen you over the more difficult meal. The mouse slowly approaches you, one of its paws smashing down onto the soil and sending particles of dirt flying as it makes its approach. Another step forward. You begin to flee. The Rattata suddenly springs forward, a footpaw smashing down right in front of you, your life flashing before your eyes as you're sent tumbling onto your back. Looking up, you see the creature's enormous face peering down at you, sizing you up. This is it. Your life is over. The Rattata might not have stepped on you, but it's about to claim you as a meal all the same and there's not a damn thing you can do about it.
"SHOO!" A female voice booms. You hear a terrifyingly loud whoooosh, followed by a scream issued from the gigantic rat. A rush of displaced air sends you rolling across the soil and bumping into the building' wooden wall. Turning your attention up, you see a tan-skinned woman in her 40s, broom in hand, a look of clear agitation marking her face. Human though she may be, she is even larger than the Pokemon, and for a moment you worry that she may direct that broom at hers towards you. Mercifully, however, her gaze is averted from you, instead locked on the now-fleeing Rattata. You take advantage of this to hide between the trashcan and the wall.
KTHUD KTHUD. The woman's sandaled feet smash down onto the soil as you flee to safety. You quiver in fear as she pushes the can about in an attempt to firmly secure the lid over the rim, an explosion of CLANKS and RUMBLES resonating form the shifting trashcan. Soon enough, the woman leaves the scene. Mercifully, despite all her motions, you managed to avoid getting crushed under the can or ground against the house's wall.
After a few minutes you emerge from your hiding spot, finally safe from the initial threats of the rat and the lady. You begin to survey your surroundings more carefully, and finally realize just where you are. Off to the southeast, you can see a young boy of about 10 heading into what is very clearly the main building of the Oak Institute of Pokemon Studies. This would have to be Pallet Town, one of the smallest towns in the Kanto-Johto region.
From here, you have a few options.
You could probably head your way out of town. To the North lies Route 1, one of the safest roads in the region. To the south lies the watery Route 21, a far more treacherous route.
While a few households are present, you don't feel a compelling urge to head into any of them, except perhaps the house you're currently standing beside.
You could absolutely head towards the Institute and hopefully get the attention of a sympathetic researcher there.
Finally, you could search the town for shelter. The flowerpatch in the southwest might do the trick.