The Heroes defeated Dimentio. But that doesn’t mean he was gone for good. He managed to sneak to your planet with the help of his magic. (Sneaky! Right?) He was walking around and he then bumped into you. Your aura was just like Luigi’s.. and he saw that you might be useful to him..

“Ah.. well hello there, little one.”

He bowed and he chuckled.

“It looks like the wind of fate brought us together.”

He smiled and he grabbed your hand.