Chester & Kid Rot from Grossology cosplay as Izuku Midoriya (Deku) and Shigaraki Tomura from Boku No Hero Acadamia.
I thought it was fitting since Chester always wanted to be a hero and his evil alter ego Kid Rot had the power to decay.
I wonder how many fans of Boku No Hero knows about Grossology and vice versa? Probably not many.
Grossology belongs to Nelvana.
Boku No Hero Acadamia belongs to Kōhei Horikoshi.