Johnny Yong Bosch for Dusk Shine, Atticus Shaffer for male Sweetie Belle, and Greg Cipes for male Scootaloo

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

James Marsden I think would make a great Elusive

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

No, Travis Turner as male Scootaloo. I think he has a more fitting voice.

For the voice of male Scootaloo, I think I choose Josh Brener

I think Vincent Tong should definitely voice Elusive. Vincent’s Prince Blueblood voice would fit Elusive perfectly. Mainly because it’s very posh sounding.

I think I would choose Travis Turner to voice the male versions of Scootaloo, Sweetie Belle, and Babs Seed, Trevor Lissauer to voice Bubble Berry, and Jason Marsden to voice Dusk Shine

Danny Cooksey as Rainbow Blitz. His voice would be really fitting for the character.

I pick Peter New for male Applejack

I think a better name for male Applejack is Applejohn

I think either Lee Tockar or Vincent Tong would make great voice choices for Elusive.

Travis Turner would also be male Babs Seed and Vincent Tong would also be Rainbow Blitz

No, wait, Samuel Vincent as Butterscotch and Travis Turner as male Sweetie Belle!

No, wait, I got it!
 
Trevor Lissauer as Dusk Shine  
Tom Kenny as Elusive  
Vincent Tong as Rainbow Blitz and male Scootaloo  
Travis Turner as Butterscotch and male Babs Seed  
Eric Bauza as Bubble Berry  
Jack McBrayer as male Applejack  
Lucas Grabeel as male Apple Bloom  
Atticus Shaffer as male Sweetie Belle

You know, I actually think Travis Turner should voice both male Scootaloo and male Babs

Travis Turner and Ben Schwartz as male Babs Seed and Scootaloo

Jason Marsden for male Babs Seed

Atticus Shaffer I think is more perfect for male Sweetie Belle. His voice often cracks. In a good way that is.

Silver Beau (my name choice for male Sweetie Belle, because it’s most accurate) should actually be voiced by Daniel Brochu, using his Buster Baxter voice from Arthur. It’s the most perfect fitting voice for male Sweetie Belle!

Yes, I think Richard Ian Cox should be the voice of Rainbow Blitz. Using his Goku voice.

Or should Richard Ian Cox voice Rainbow Blitz?

No, wait! Vincent Tong as Rainbow Blitz is better!

My voice cast for these R63 MLP characters:
 
Richard Ian Cox - Bubble Berry  
Jason Marsden - Rainbow Blitz and Dusk Shine  
Vincent Tong - Elusive  
Samuel Vincent - Butterscotch  
Jack McBrayer - Applebuck (my name choice for male Applejack)  
Travis Turner - Scooterzoom (my name choice for male Scootaloo)  
Lucas Grabeel - Apple Sprout (my name choice for male Apple Bloom, obviously because “bloom” and “sprout” are both synonyms for the word, “grow”.  
Atticus Shaffer - Silver Beau (my name choice for male Sweetie Belle, obviously because Beau and Belle are both French names, and Belle is a feminine name, whilst Beau is a masculine name, and I think Silver is a hundred times better than Sweepy; Sweepy is just such a mean, stupid, ugly, hurtful, irritating, jabbing, haunting, awful, terrible, horrible, dirty, offensive, sadistic, harsh, cruel, evil, flibbertigibbet, gobbledygook first name)  
Greg Cipes - Brad Seed (my name choice for male Babs Seed)

Also, for male Scootaloo, I prefer Scooterzoom, and for male Sweetie Belle, I prefer Silver Beau