In this, AU Izuku is quirkless, and his kinda swapped with Mei Hatsume as in his the one who builds new stuff for heros

After a big fight, something went wrong with Bakugos explosions, and Aizawa told Bakugo to go into the engineering room or whatever it's called. When he went inside, he was shocked to see Izuku, the quirkless loser he used to bully well, but since he had changed, he wasn't really angry, just shocked

Bakugo: What the hell are you doing here, Deku?