Pokémon: Raising Abandoned Pokémon into Legends

[Pokémon + Eternal Enemy of Team Rocket + Female Lead Cynthia + Shiny Charizard + Metronome that can roll legendary moves] Transmigrating into the Pokémon world, Rio, a psychologist, discovers that the more a Pokémon has been abandoned by humans and the deeper its emotional trauma, the more easily it awakens forbidden powers. He healed a Shiny Charmander that had been ruined by the battle arena. After it evolved into Charizard, it gained Ho‑Oh's exclusive move, Sacred Fire. A Munchlax that was abandoned simply because it ate too much, after being healed, obtained the Lucky Stone—an item nurtured by Arceus. From then on, its Metronome exclusively calls upon legendary moves. A Mankey that couldn't control its rage and brutally beat its own Trainer, leading to its abandonment, after evolving into Annihilape, gained Regigigas's exclusive move, Crush Grip. From then on, it knocks out anything with just one punch. A Pokémon that was forgotten at the bottom of the sea for several... — Description from novelcodex.org