Pokemon: My Goal Is to Become a World Explorer

[No System, no aptitude, Starter Pokémon: Primeape.]

The first three chapters foreshadow events 26 years in the future.

The protagonist is a transmigrator. The story is set thirty years before Ash sets out, just as the first Kanto League is getting underway.

His rival is Professor Oak, who has just graduated from Tam Hong University and sets out on a journey with Agatha and Steel.

The protagonist's golden finger is simply his knowledge of the Pokédex. He has no Viridian Force, no psychic powers, and no Aura. He's just a Trainer.

He was best friends with Giovanni when they were young.

(Actually, never mind, I'll just spoil it... The future can be changed. Celebi is the stroke of genius behind it all. Who knows how far I'll get with this story.)