Pokémon: I'm a Hundred-Face Monster

The main character was the most special genetic mutant among the Hundred-Face Monsters. In simple words, he was a flashing elf.

Its digestive function was specialized, and it could receive gifts from the things it digested.

Until one day, he digested the brain of a transmigrator and obtained his memories, knowledge, and cheat. From then on, a strange hundred-face monster appeared in this world.

After ambushing the girl and imprisoning her in the basement, he faced her and Chilullian, saying,""In the name of survival and reproduction, ladies, are you willing to lay eggs with me?”

Would I tell you that the main character is an egg-laying demon king who is 100% sure to make the other party lay eggs? (Comical)