>>55162759His Aura is simply better. Overwhelming, monstrous. A pure, vibrant red color. None in recorded history have ever equalled his raw output—not that he's ever shown the extent of what he can do.
He never speaks, but doesn't need to. There is perfect understanding between him and his Pokemon. They execute elaborate strategies on the spot without him issuing a single command, and abandon or alter them with similar ease. No psychic ability has been attributed to this.
He posseses the uncanny skill to know exactly what his opponent is switching into, always. Extensive investigation into the matter has ruled out Psychic or similarly supernatural methods.
He single-handedly tore apart the Rocket organization as a fletchling trainer and defeated newly-minted prodigy Blue a mere hour after his official inauguration as Champion.
There is no stronger, more mysterious, or harder to reach trainer. From the few recorded matches we have of him we see a genius of combat, powered by instinct, brutally and efficiently tearing apart anything that stands in his way. He is Victory incarnate.
One can only guess what he's been doing in the shadows since his dissapearance, but it's likely he's only gotten stronger.