Johnny Yong Bosch as Dusk Shine and Atticus Shaffer as colt Sweetie Belle, Greg Cipes as colt Scootaloo

Lucas Grabeel as male Apple Bloom  
Travis Turner as male Sweetie Belle and male Babs Seed  
Josh Brener as male Scootaloo

James Marsden as Elusive

Actually, Lucas Grabeel as both male Scootaloo and male Apple Bloom, and Travis Turner as both male Sweetie Belle and male Babs Seed.

I changed my mind. Travis Turner as male Scootaloo. His voice is more fitting.

Josh Brener as the voice of male Scootaloo

Vincent Tong! Definitely Vincent Tong for Elusive! Vincent’s Prince Blueblood voice would fit Elusive perfectly!

Travis Turner as male Scootaloo, male Sweetie Belle, and male Babs Seed, Trevor Lissauer as Bubble Berry, and Jason Marsden as Dusk Shine

Danny Cooksey would make a good voice for Rainbow Blitz. He has a rather distinctive, slightly raspy kind of voice.

Peter New as male Applejack

Applejohn is better name for male Applejack

Lee Tockar or Vincent Tong as Elusive.

Travis Turner would also voice male Babs Seed of course, Vincent Tong would also voice Rainbow Blitz

Samuel Vincent as Butterscotch, and Travis Turner as male Sweetie Belle

Tom Kenny as Elusive I think seems accurate.

Travis Turner as Butterscotch and male Babs Seed, Eric Bauza as Bubble Berry, either Taran Killam or Tom Kenny as Elusive, and Vincent Tong as male Scootaloo

Trevor Lissauer as Dusk Shine, Samuel Vincent as Bubble Berry, Butterscotch, and Elusive

Atticus Shaffer as male Sweetie Belle

Richard Ian Cox as Bubble Berry, Vincent Tong as Dusk Shine and Rainbow Blitz, Samuel Vincent as Elusive and Butterscotch, Jack McBrayer as Applebuck (this name should be for male Applejack), Lucas Grabeel as Apple Sprout (my name for Apple Bloom, because “sprout” and “bloom” are synonyms), Travis Turner as Scooterzoom (my name for male Scootaloo) and Brad Seed (my name for male Babs Seed), and Jason Drucker as Silver Beau (my name for male Sweetie Belle, because in French, Beau means beauty, and Belle means beautiful, and Beau’s a more male-ish name, and Silver Beau, I think, is way better than Silver Bell or Sweepy Bell)

Yes, I’m going back with Travis Turner as Scootaloo again

On second thought, I think that not only would Travis Turner should voice male Babs but also male Scootaloo. I just think the voice would be fitting.