After putting the two powerful artifacts close to each other, it doesn’t go well.
Both the Elements of Harmony and the Chaos Emeralds flew off all of Equestria. So the Mane 6 and the Dreamcaster go off on a big journey to make new friends, make new rivals by accident along the way and even find some secret places.
But since the Chaos Emeralds and Elements of Harmony caused them to scatter, a some new/old and unknown bad guys come in for example: Bowser and Dr. Neo Cortex, including friends for example: Mario Brothers, Yoshi, Kirby, and Crash Bandicoot. (These characters are important, but I can only put 3 series tags)
P.S.: Violence because of fight scenes