What about a BNHA AU where Izuku is Quirkless but does have quite the skill with a boomerang?
Series: Boku no Hero Academia AU Criteria: Izuku may be quirkless, but that does not mean he's without options, he just has to come back around to it. AU title (optional): Boomeranger
Izuku never got a quirk, and after the Sludge villain incident, decides that he needs to do more to prepare for heroics.
He takes up running, and begins cleaning a beach full of junk, while he's doing that, comes across a box full of curiously curved pieces of wood. Finding an instruction manual in Australian for these Boomerangs, he thinks this might be useful.
Turns out he can do a lot of advanced tricks easily with them and takes on the mantle of Boomeranger, a vigilante that looks like Crocodile Dundee with a green mask. He has a terrible Australian accent and mostly just smacks people with his boomerangs.
Some of those people are heroes he's trying to get the attention of. They get the soft plastic boomerangs he makes just for this purpose after the first time nearly concussed the hero he was trying to get the attention of.
No one wants to know where he got the mechanical kangaroo that follows him around like a puppy (and turns into a backpack that he carries around as a civilian).
