Disclaimer: I don't any characters or concepts; they belong to their respective owners.
Note: All characters are written as older than 18 years of age.
It was very quiet, quieter than Ash would have liked. He was miles away from the nearest town, and not even the wind stirred the tall grass. Nervously, Ash held a Poké Ball in his hand, an empty one, in case of trouble.
Suddenly, Ash heard rustling in the grass ahead of him. He froze in terror, sure that this would be the last breath he would take. Slowly, a yellow creature emerged. The Pokémon had pointed ears, and a white ruff around its neck. Ash gazed at its half-closed eyes, and its stumbling gait, and breathed a sigh of relief. This Pokémon was obviously too slow to catch him off guard.
Ash's eyes wandered to the object the Pokémon held in its left hand. It was a metal disc held on a thong that would around the Pokémon's wrist. Whenever the Pokémon moved, the metal disc moved too, taking an infinity-shaped path. As it spun, the metal caught the light, and flashed, blinding Ash. All of a sudden, Ash found that he couldn't look away. The disc seemed to take up all of his vision. The Pokémon stepped closer and closer, it's eyes still half-closed. With each step, Ash felt more listless, as lethargy crept into his bones. His breathing slowed to match the disc's path, and his mind emptied. When the Pokémon was only a few steps away, the Poké Ball dropped from Ash's nerveless hands.
That, oddly enough, was what saved him. The Poké Ball bounced once, then twice, and then rolled towards the approaching Pokémon. When the Poké Ball touched it, the Pokémon vanished. Immediately, Ash's mind cleared, and he looked around, bewildered. For a moment, he had no idea where the Pokémon had gone, but then Ash noticed the Poké Ball. Slowly, he bent down to pick it up. It was heavy, which was indicative that a Pokémon had been caught inside.
Ash looked around for Pikachu. The lightning Pokémon was lying on the ground, its eyes closed. Ash nudged it with a foot. Pikachu stirred.
"Pika?" it asked as it opened its eyes.
"It put you to sleep", Ash muttered to himself, as he checked over the Pokémon to make sure it wasn't injured. "And it nearly hypnotised me. There's only one Pokémon that I've heard of, that has such power – Hypno. But they're really rare!"
Ash looked down at the Poké Ball in his hand. Could it really be a Hypno? He needed to see it again. Ash threw the Poké Ball down at the ground, and the yellow Pokémon was standing again in front of him. Ash looked at it, all the while carefully avoiding his gaze being being caught again by the swinging pendulum. His guess had been right; this Pokémon was a Hypno.
As if to prove Ash right, the Pokémon looked dolefully up at him, and said, "Hypno", in a sonorous voice. Ash smiled to himself as he ordered Hypno back into the Poké Ball. The Pokémon would be a good edition to his team.