Iron Man: My Hero Academia Season 1

After Tony Stark snapped, saving the world in Avengers Endgame, his soul was given a strange mission before it could pass on, go to another world and teach someone to become that world's Iron Man. Takumi Sakai is a quirkless boy from the world of MHA who still dreams of being a hero, although unlike Izuku Midoriya, Takumi never stumbled across a Pro Hero with a transferable quirk, and is currently in UA's Support Course. After a villain holds people hostage, Takumi uses a suit of armor like the Iron Man mk.1 to defeat the villain and escape, seeing this, Spirit Tony appears to Takumi with an offer, "I am a Pro Hero from another world... and long story short I need to train someone in this world to become a hero before I can pass on... I can teach you to become a hero even without a quirk, I can teach you to become Iron Man."

(Story started on May 2021... this side note is more for records purposes)