Pokemon: I Started by Devoting Myself to Marnie, Then Won the Championship

[Pokemon fan fiction + Starter Pokémon Scorbunny + single heroine Marnie] [No System + no golden finger + no indiscriminate Pokemon collecting] Good news: I was born in the Galar Region, and my childhood friend is Marnie, Spikemuth's idol! Bad news: No System, no mysterious old mentor, not even a golden finger! The contrast couldn't be greater: an ordinary person from a rundown slum has to take on the undisputed champion, backed by the resources of the entire region! First battle... With nothing but passion and bonds, Yang Tai pulls off an incredible comeback. Opponent: “This makes no sense! Your stats are wrong!” The Nth battle... Yang Tai seamlessly combines Mega Evolution, Z-Moves, and Gigantamax. Steven / Leon / Cynthia: “And you call that having no golden finger?!” The climactic showdown... Yang Tai faces Leon, the undefeated Champion. Leon: “Come on! Show me your limits!” The result: the ace Charizard falls, and a new king takes the throne! Yang Tai, raising an eyebrow: “Bonds are a miracle that surpasses all data.” The crowd erupts, while Team Yell's A Jie cheers like crazy! Wait, if he has no cheats, how can he be Marnie's biggest fan and still win the World Championship along the way?!