This is a spin on the "Spiderverse" movies but does not have any correlation with those films.

Rainbow Dash accidentally launches a Rainboom one morning to find herself in another version of Equestria. From there, she goes on an adventure, learning that hundreds of other Rainbow Dashes have banded together to try to stop one evil Rainbow Dash named Hurricane and other evil variants of herself from taking over the Multiverse. The Rainbow Dash we know makes friends with a Rodeo Star named Zap Apple and Rainbow Skies, a Griffon who was raised by Windy and Bow as if she were their daughter. As the trio trek through the multiverse, they soon discover a conspiracy that will force our Rainbow Dash to face the worst aspects of herself in more ways than one.

Artist: Pridark