I can't believe I didn't see this one sooner. We actually got the video (After the break) in the inbox and I figured I might as well spotlight the page it originally came from!
"Sweetie Bot Replies" is based off of the Sweetie belle android in Friendship is Witchcraft. For those that have never watched the series before, It is sort of a running joke that some ponies are actually robots, and completely unaware of it. In other words, the greatest thing ever.
The video after the break will take you through a few examples of what this tumblr is capable of. Hopefully they make more of these in the future!
You can also find your classic text/image blog here!