Twilight:Lele Pons both
Sunset:Summerella viner
Rarity:Amanda Cerny both
Pinkie:Liza both
Applejack:Alliecat both
Fluttershy:Sara Hopkins viner
Rainbow dash:Jessi Smiles both
Leo:Sam from Sam and cobey both
Raph:cobey from Sam and cobey both
Donnie:Mat pat. youtuber
Mikey:Jake Paul. Both
Casey:Josh Peck both Aka the voice actor of Casey
Slash:David Dobrik both
Sonic:Rudy Mancuso both

I did this based on their personality 😅

Ps...Rip vine 😞