Currently Rainbow Dash does not appear to have a boyfriend.
super speed
roscoe dashs real name is jeffery.
Its rainbow
The cast of The Rainbow Avenger - 1998 includes: Miles as The Boyfriend Fred Eithel as The Villain Alison Lonesome as The Victim
The rainbow does not have pink in it.
Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers
Rainbow Batter, rainbow frosting and rainbow sprinkles in a rainbow cupcake liner
Rainbow Ponyta looks like a rainbow
The rainbow represents peace.
a rainbow
Rainbow
Only in fan stuff like fanfics or art. Obviously not in the show, since sonic is in no way related to mlp. But even in the fandom, most people don't think rainbow dash and sonic belong togerher. Most fans will pair her up with other characters from the show. eg Rainbow Dash and Pinkie Pie.