Description:
Rainbow Dash=Boomhauer (Fast flyer, fast mouth I guess)
Pinkie Pie=Dale (Both are kind of crazy)
Applejack=Hank (Both are southerners, have an affection for a certain item [apples and propane], and share the same voice actor as the fast guy)
Fluttershy=Bill (I didn’t know why I chose Fluttershy. Probably because of this)
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Based on this