Almost three months had passed since Satoshi started training as a disciple. Quite frankly, he had learned so much about himself, including his innate superpower that had been with him the whole time.
Now that they were nearing their final preparations to face the World Eater, Satoshi decided to go all out. On the first week of the third month, he challenged both Hermione and Scarlet. And then in the following weeks, he challenged the other Managers who were present.
Even Magnus Carter didn't escape Satoshi's challenge, and then what followed was a string of fights that involved Satoshi facing one of the Managers. It was an unexpected development, and everyone was in on it.
Of course, Satoshi couldn't win every fight. His fight against Bucky Barnes was a fluke, and the other Managers who were already aware of his superpower didn't give him a single opening.