Elf: I am the adopted son of Sakagi

Introduction: Traveling to an elf world that has never been heard of, Mercury was rescued and adopted by a kind uncle.This uncle's name is Sakaki, a gym trainer in Joban City. He is also known as "Sakaki of the Earth" and "Invincible General" because of his outstanding strength.This sounds like a decent person in the alliance!Mercury thought to himself, is this an inappropriate second-generation start?But Mercury has been a little troubled recently. Who can tell him what kind of organization the Rockets are?Why do these people call Uncle Sakaki boss? (PS: anime, fandom, Pokémon, special world, slow to warm up, not brainless)