Ant teleports Hroda into the MHA universe and he lands right infront of the UA school. He later tells Hroda that he has given him a life in that world and he is now a student at UA high. He tells Hroda that he must defeat 5 characters, Izuku Midoriya, Katsuki Bakugo, Shoto Todoroki, Some random old guy called All for one and a man child with crusty lips known as Shigaraki.
Hroda just listens to the names and he is frightened, he believes that the fights will be difficult but that's what makes it fun. Ant disconnects with Hroda and wishes him luck. Hroda enters the school and is a bit confused because he doesn't know where to go, he ends up interacting with Aizawa, a teacher at UA high. Aizawa notices that he can't erase Hroda's quirk and he is a bit suspicious of him. Anyways, he takes Hroda to class 1-A and he introduces himself as a new student.
After introducing himself to everyone in the class, Bakugo starts to take a liking to Hroda so he tells Hroda to go with him to the USJ to spar. Since it was free time, the teachers didn't mind. Hroda was ready to fight and Bakugo exploded his way to Hroda. Sadly, Hroda noticed that Bakugo was so weak and started to laugh. Before Bakugo could explode Hroda in the face, he just kicks him into the ceiling. Everyone becomes terrified at Hroda's strength and start to wonder what his quirk was. He then told Todoroki, Deku and Bakugo to come at him together. They thought that Hroda was getting cocky after beating Bakugo so they agreed and went at him all at once.
They all tried to attack Hroda independently but the gravity in the MHA world was so low for Hroda that he could move around like he was as light as air. He made quick work of the boys and tried to locate the last two characters that remain. But before he went Deku asked Hroda, "Who are you?" and he replied with "You can call me the Dimension Hopper" and flew away to find his next victims.
He located the league of villains by searching the entire city for a cyan haired crusty lipped man child. The villains didn't know who this intruder was and attacked him on sight. Everyone used their powers to destroy this intruder, filling up the whole room with smoke. But after the smoke cleared, Hroda was unharmed and the villains were left in awe. Hroda then noticed a cyan haired man with crusty lips and moved towards him. Shigaraki tried to touch Hroda but he was too slow to him and easily avoided his touch. Hroda didn't know why Shigaraki wanted to touch him but he made sure he didn't. And when the villains saw that they were no match for Hroda, they tried to escape using kurogiri's teleportation but Hroda blew him away, literally, he used his breath to blow the other villains away.
Shigaraki then noticed that he had a chance to touch and decay Hroda and he did it. He was able to successfully touch Hroda but nothing seemed to happen. Hroda was technically immortal since hybrids in The Dark Orb universe stopped aging at the age of 24, Shigaraki accelerated the process and jumped the cells of Hroda's body to that age. Hroda then looked at Shigaraki with a menacing smile and punched him in the face but did not kill him.
He walked around the town again but this time he couldn't find All For One, so instead he walked around the entire planet of MHA in a matter of 2 seconds. He then found AFO in his secret hideout at where he started, in Japan, Hroda facepalmed and challenged AFO. All For One was surprised to see a hero in his hideout and told him, "Don't worry, I'll give you a quick death". Hroda got angry and the scene cut to him going out of the hideout and cleaning the blood of his hands.
Ant quickly teleported Hroda through different dimensions and it was a beautiful sight to behold, the lights and the colors were all "cosmic" as one might say. He was then dropped from the sky into the world of Demon Slayer.