Umihara Reiji finds himself stranded on an unfamiliar island after an inexplicable tempest—transported not to safety, but into the Pokémon world itself. Without starter Pokémon, Poké Balls, or any provisions, he faces the harsh realities of survival armed only with determination and the ocean's mercy. Everything shifts when he encounters a struggling Poliwag. Together, they begin an unlikely partnership forged through necessity and perseverance. A mysterious Proficiency System becomes his greatest asset, quantifying his progress across combat moves, Pokémon abilities, and survival techniques like fishing and shelter construction. Each advancement, no matter how small, marks his growth and brings him closer to another day alive. This isn't a journey toward championship glory—it's a raw struggle for existence in a world where preparation and strategy mean the difference between thriving and perishing. As a transmigrated adult with deep knowledge of the anime, manga, and games, Reiji approaches his predicament with calculated reasoning and analytical thinking rather than youthful idealism. The early narrative emphasizes authentic survival gameplay: securing food and water, building shelter, and developing genuine trust with his Poliwag companion. Set in the anime version of the Pokémon world, this tale prioritizes gritty, methodical progression over fantastical adventure.