Mad mew mew is a secret boss on the Nintendo Switch edition of Undertale who can be fought after defeating Mettaton. She can be found in the Dog Shrine in Sans and Papyrus' house. She is the cousin of Napstablook and Mettaton and used to be a genderless ghost.

you can suggest ideas to me here, or anything else. I apologize for the voice (frankly, I think they should have an option to not use a voice)

You can use this to create your own characters. You can also make scenarios.