BBBHuey's avatar
Yeah, but the Mane 6 were the ONLY ponies present in area where they were fighting at the time.

They could've gone with anypony strong or powerful, but instead the Changelings chose to become the Mane 6, suggesting that they can only change into what's in front or around them.
SuperBigMac's avatar
Or, y'know, they're banking on the Mane 6 to fight each other in the ensuing brawl as well.

Also, I doubt a regular drone could change into anyone "powerful." That's why only Chrysalis took on the form of Cadance; if it was unnecessary for her to be the one to do so, she had a near-infinite pool of minions who could have done so in her stead.

I'd say it's more likely that, with whatever amount of energy those changelings had, they were planning to use in-fighting and superior numbers to win that fight. Thinking about it, I can't recall a single changeling that looked like Rarity or Twilight ever using magic, so it's likely they couldn't.
BBBHuey's avatar
The goal was probably causing confusion among the Mane 6. A plan that worked a bit too well as some changelings wound up fighting eachother, being unable to tell who was a pony or a changeling in disguise. 

A changling could change into Bulk Biceps, but would still not be as strong or talented as the original. When changed, the changelings retain their own magic and not the pony they impersonate.

Why the Queen went instead of her drones could be that the drones weren't smart enough to pull off a switcheroo like that and be that convincing. One could say they were plan B if plan A failed.
SuperBigMac's avatar
Aye, my thoughts exactly. Which is also, really, why I'm kinda not-surprised they somehow won in the show. Like, if these were humans, the Changelings would've lost outright, because we're too untrusting. But ponies? They would've won EASILY had it not been for Twilight using Chrysalis and Cadance's musical montage as a cover for getting to the wedding on time.
Colorstrike07's avatar
If your talking about if changelings can create pony at random yes they can (i think....) 
cause my oc is part changeling
SuperBigMac's avatar
If they can create pony at random? What?

Nay, I meant that Twilight and the ponies only won in the end because of This Day Aria's Montage-esque power letting them get Cadance to the wedding on time.