A young human boy of age ten is sent to Equestria after he watched his own mother turning into a donkey by a virus that turned people into animals. Princess Luna hears the child's wish for a new home and loving family. She grants the child his wish and sends him to Equestria. However at the time, the child was wearing a toy Omnitrix, a gift from his father before he passed away and Luna's magic turned the fake to a real and adding fictional monsters from the child's world. Join us as we watch this child grow up and fight evil.

This story takes place just before the end of season 2 and in an alternate Equestria where there are twelve Elements of Harmony.
Twilight Sparkle: Magic
Applejack: Honesty
Fluttershy: Kindness
Pinkie Pie: Laughter
Rarity: Generosity
Rainbow Dash: Loyalty
Sunset Shimmer: forgiveness
Adagio Dazzle: Courage
Aria Blaze: Love
Sonata Dusk: Humility
Starlight Glimmer: Redemption
Trixie: Empathy
the crossover part is that the child has an Omnitrix which can turn him into monsters from the Ultraman series the first ten being:
Gomora
Litra
Eleking
Miclas
Windom
Agira
Red King
Lunaticks
Telesdon
and Arstron
also monsters and dragons from the mobile games My Singing Monsters, Monster Legends and Dragon City with appear as species that already live in Equestria and the child's siblings with appear in Equestria looking a little different