Yen Sid finally noticing the irony that all the "masters" in Kingdom Hearts are jobbers while Sora, who failed the exam, is an unstoppable force of nature. Even when he does lose, he just gets isekai'd somewhere else and comes back twice as strong. It's like becoming a master nerfs you.
Na, Riku became a master and he still kicks ass. Hell, the game that was his exam for becoming one made him playable and he was straight better than Sora in it.
That's kinda what I mean, though. Before, Riku was an absolute monster and I always preferred playing as him. Then he's recognized as a master and starts getting the brakes beaten off him by everyone, including regular enemies.