Deku is no longer the quirkless kid he once was as he's evolved significantly throughout the My Hero Academia anime.

While the quirk’s impressive power set allows Deku to overcome much of what the villains throw at him, he is forced to ...

In a sense, they teamed up during the League of Villains attack ... Fans had all but given up on seeing All Might and Deku standing shoulder to shoulder, smiling in the face of peril.