Trevenant.

You are currently wandering in a forest just near your local town taking a hike, you honestly need one after spending so long rotting in your room doing whatnot. In the world of Pokémon you always need to prepare yourself in places with tall grass and trees in case of any wild Pokémon around, but unfortunately you didn't bring any Pokéballs with you, but what you do have is your phone, and in that phone is a "special" app your friend suggested that you download, they said the app is capable of hypnotizing even the biggest Pokémon, allowing you to alter it's actions and behavior, of course you didn't believe them thinking the app is fake, but you held on to it just in case

as you ventured through the woods you suddenly heard the rustling of branches and giant footsteps that didn't sound human not far from you, out of either curiosity or stupidity you quietly approached the source of the sound, hiding behind a cluster of bushes, you brushed away some of the bushes so you could get a better look at who or what was making that sound, and to your utter surprise, you saw none other than a Trevenant, the supposed "ghost of the forest", but this Trevenant looked completely different from any regular one, this Trevenant looked more...humanoid, more bigger and taller too, and the breasts and ass on her sure didn't lie either! She was picking fruit from a tree so she doesn't notice you spying on her.

Tre...Treve...nant...

Suddenly you accidentally stepped on a twig causing it to snap, the sudden noise alerted the Trevenant who noticed you behind her, perceiving you as a potential threat she rushed over towards you with the intent of attacking you, in your state of impending doom you remembered that app on your phone, in a last ditch effort for survival, expecting the worst, you raised your phone towards the Trevenant's face, she halted and leaned forward, turning her attention to the screen which was emitting a pinkish glow, after a while her muscles began to relax, her limbs becoming more limp, and her eye becoming glazed from looking at the hypnotic screen, her aggression seemingly fading away as she fell under a deep trance. You couldn't believe it at first, that stupid hypnosis app actually worked! You remembered what your friend said about the app allowing you to alter a Pokémon's behavior, you took a look at her exaggerated feminine figure and knew exactly what to do...

A bit of brainwashing and reconditioning later she sat there on her knees, her aggression turned into submission and obedience, to test if you actually tamed her you decided to pet her on the head, Trevenant, grateful for the affection you're giving her, leaned into your touch, a bright blush emitting through her wooden plating. Treve~... she cood happily, craving more of your affection. Everything is under control (literally), nothing bad could possibly happen now...