Ultraman: Surrounded from the Start, I'm the Greatest Villain

[No heroine + fun-loving protagonist. You can enjoy this even if you haven't read Zerg King] After transmigrating to the Ultraman world, Dagudodo transformed into the ultimate villain feared by everyone. It turned out that his five subordinates had transmigrated to the Ultraman world before him. With their absurdly powerful abilities, they became boss-level opponents for various Ultramen, making the title of Zerg King despised by the forces of light and zealously followed by the forces of darkness. He became the greatest villain of all. And so, Dagudodo and his five subordinates set off on a journey to toy with everyone. Zero: “Why does every Fivefold Clown have to pick on me?” Taro: “...After that incident, the embarrassing past I share with my brothers is still crystal clear.” Alien Bat: “Waaah, give me back Zetton! Fivefold Clown, I'm not done with you!” Belial: “I'm supposed to be a warrior of darkness, so why am I being treated like a scientist?” Tregear: “Other villains do bad things either because they have ambitions or because their ideals clash with others. But when I asked the Zerg King, he gave me just two words: ‘It's fun.’” In the end, for some inexplicable reason, Dagudodo was awarded the title of Greatest Villain by every alien in the universe. All he wanted to say was: “Let me set the record straight: I'm not interested in ruling the universe. You aliens, stop saying one by one that you want to sacrifice your lives to me.” (This Zerg King comes from before the one in the Super Sentai world chose Earth as his arena.)