In various Power Ponies comics, stories, and such, the Mane-iac (aka, Tresemme) isn't shown as to what could happen if she chose to be a hero instead of a villain. I, Wayward Shadow, have taken the task to answer the question: "What If...Tresemme never went insane and chose to use her powers for good...rather than evil?"

This takes place in an Alternate Universe, where Ponyville is replaced by Maretropolis, everypony is anthro, and (obviously, if the title hasn't given that away) the circumstances leading up to the creation of the Mane-iac create a hero instead of a villain.

Slice of life tag because Adventure, Mystery, and other such tags are all part of a Superhero's life.