becky (aka WordGirl) found a mysterious mirror one day in her closet, bob, her pet monkey, was unsure if she should test it out but Becky assured him that it'll be okay so he jumped in that... mirror portal.

when becky got into the mirror, she fell out into a field, (equestria) she shook her head to get rid of her dizziness, when she looked at herself, she was a pony! Well... a naked pony. (Since ponies don't really wear any clothes)

becky Botsford: "oh my god... I'm a pony!" she said in shock and slight joy, but then she tripped and fell out of the mirror back to her world.

bob: "Squeak! Squeak!"

becky Botsford: "well when I fell in I was a pony with no clothes and- I gotta tell violet and Scoops about this!"