When Trixie is told about a Artifact that can reshape realty, She goes to see it for herself. During the times she is there, she gets a hold of the artifact and Rainbow's breaks it, having it shatter across four dimensions. When being call by Princess Luna, Rainbow Dash steps up and marks on a journey though realty to fix it. This time she is help by three other ponies that are tie to her, Firefly, Zapp, and Rainbow Mask. Together, the four work together to save their dimensions and each others from being in risk from wiping out.
Firefly- From Gen-1, Like Rainbow Dash, Firefly is fast at speed, but she is given the ability to preform stealth attacks. Firefly can even hide in shadows thanks to a spell that cloak in when ever she is in the shadows. Firefly, take the most hits from all four of them.
Rainbow Dash-The one that everyone knows. Rainbow is fast at speed and is give the ability to be warn about incoming attacks. The other do not share this. Rainbow can easy take out enemies. Rainbow Dash is the fastest of all four them.
Zapp-From the Power Ponies. Zapp is just like Rainbow Dash, only she more of a hero. Zapp can all ready control the weather, but is the given the ability to use a Thunder Mode. Zapp is strongest of the four and can handle large groups of enemies.
Rainbow Mask-My OC, Rainbow Mask is the descendant of Rainbow Dash. Rainbow Mask matches the speed of Rainbow Dash. Mask is given the ability to turn her Sonic RainBoom into a ground-pound move . Rainbow Mask, is the most balance of the four. Even if she shares Rainbow's speed.