Pokemon: I'm a Champion, but I Just Want to Retire

[Pokemon + System + Soul Transmigration + Battles + Female Lead: Cynthia + Starting Pokemon: Riolu]

My name is Dongfang Chi. I transmigrated. It was a stormy night, and I was just talking to myself in front of my computer when that wretched Heaven sent me packing overnight through the power lines. By the time I woke up, I had transmigrated into the Pokemon world.

…

Everyone has their own special interests. Who could turn down living Pokemon? Who wouldn’t want to study them? And as I kept studying, I became a Pokémon Professor and set out on a Trainer’s journey.

A Pokémon Professor needs some strength to study Pokemon. How can you research Legendary Pokemon without being strong? And what if the villains kidnap you because you’re weak? So I’ll become Champion first, then retire.

…

It took me three years to become Champion. Everything went well until I became Champion, but then they wouldn’t let me retire!