Massive Crossover x Bakugou Twin Reader

Y/n Bakugou is the Twin brother of Katsuki Bakugou. He does have an explosion quirk but it's called Acid Explosion where he can make a normal explosion but he can also make an acid explosion where he could knock someone out with the smell or can heal someone. He is the complete opposite of Katsuki. He is nice, caring, and calm. Y/n is very smart and had made a lot of magical stuff. Like potions, swords, wands, smell books, bows, daggers, lightsabers and so much more. Y/n has secret Abilities he's never told anyone about. The only person that knows is his childhood friend Mezo Shoji. Y/n has a lab down underground in his house. He has been studying a lot of things. He did something no one could ever do tame a Nomu. He found one outside hurt so he took care of it. His name is Boom. He also has a rare butterfly that follows him around named Rainbow. Rainbow is rainbow color and can make clones of herself to other butterflies. Also, Y/n has a partner named Yoriichi Tsugikuni a man Y/n has known for a long time, Y/n met him passed out on the streets, so Y/n took him to his home and let him stay there, Yoriichi told Y/n that he came from a world full of man-eating demons. Soon Yoriichi became pretty good friends. Y/n is a pro hero he got his license at the age of 14. His hero name is Gunpowder. Your hero Costume is like your brothers but you have long sleeves sweater and some of your potions are wrapped around your belt. You have your agency.